Heres is a comparison between Mathematica 10 Raspberry prerelease functions and MMA9 functions. (That might give some indication and help to look at the documentation is a more targeted way.)
Export["NewFuncs.dat",Names["System`*"]] (*On Raspberry*)
newfuncs = Flatten[Import["NewFuncs.dat"]];
oldfuncs = Names["System`*"];
Complement[newfuncs, oldfuncs]
The output is:
{"Activate", "AffineStateSpaceModel", "AllowIncomplete", \
"AlternatingFactorial", "AntihermitianMatrixQ", \
"AntisymmetricMatrixQ", "APIFunction", "ArcCurvature", "ARCHProcess", \
"ArcLength", "Association", "AsymptoticOutputTracker", \
"AutocorrelationTest", "BarcodeImage", "BarcodeRecognize", \
"BoxObject", "CalendarConvert", "CanonicalName", "CantorStaircase", \
"ChromaticityPlot", "ClassifierFunction", "Classify", \
"ClipPlanesStyle", "CloudConnect", "CloudDeploy", "CloudDisconnect", \
"CloudEvaluate", "CloudFunction", "CloudGet", "CloudObject", \
"CloudPut", "CloudSave", "ColorCoverage", "ColorDistance", "Combine", \
"CommonName", "CompositeQ", "Computed", "ConformImages", "ConformsQ", \
"ConicHullRegion", "ConicHullRegion3DBox", "ConicHullRegionBox", \
"ConstantImage", "CountBy", "CountedBy", "CreateUUID", \
"CurrencyConvert", "DataAssembly", "DatedUnit", "DateFormat", \
"DateObject", "DateObjectQ", "DefaultParameterType", \
"DefaultReturnType", "DefaultView", "DeviceClose", "DeviceConfigure", \
"DeviceDriverRepository", "DeviceExecute", "DeviceInformation", \
"DeviceInputStream", "DeviceObject", "DeviceOpen", "DeviceOpenQ", \
"DeviceOutputStream", "DeviceRead", "DeviceReadAsynchronous", \
"DeviceReadBuffer", "DeviceReadBufferAsynchronous", \
"DeviceReadTimeSeries", "Devices", "DeviceWrite", \
"DeviceWriteAsynchronous", "DeviceWriteBuffer", \
"DeviceWriteBufferAsynchronous", "DiagonalizableMatrixQ", \
"DirichletBeta", "DirichletEta", "DirichletLambda", "DSolveValue", \
"Entity", "EntityProperties", "EntityProperty", "EntityValue", \
"Enum", "EvaluationBox", "EventSeries", "ExcludedPhysicalQuantities", \
"ExportForm", "FareySequence", "FeedbackLinearize", "Fibonorial", \
"FileTemplate", "FileTemplateApply", "FindAllPaths", "FindDevices", \
"FindEdgeIndependentPaths", "FindFundamentalCycles", \
"FindHiddenMarkovStates", "FindSpanningTree", \
"FindVertexIndependentPaths", "Flattened", "ForeignKey", \
"FormatName", "FormFunction", "FormulaData", "FormulaLookup", \
"FractionalGaussianNoiseProcess", "FrenetSerretSystem", "FresnelF", \
"FresnelG", "FullInformationOutputRegulator", "FunctionDomain", \
"FunctionRange", "GARCHProcess", "GeoArrow", "GeoBackground", \
"GeoBoundaryBox", "GeoCircle", "GeodesicArrow", "GeodesicLine", \
"GeoDisk", "GeoElevationData", "GeoGraphics", "GeoGridLines", \
"GeoGridLinesStyle", "GeoLine", "GeoMarker", "GeoPoint", \
"GeoPolygon", "GeoProjection", "GeoRange", "GeoRangePadding", \
"GeoRectangle", "GeoRhumbLine", "GeoStyle", "Graph3D", "GroupBy", \
"GroupedBy", "GrowCutBinarize", "HalfLine", "HalfPlane", \
"HiddenMarkovProcess", "ï?¯", "ï ?", "ï ", "ï ?", "ï ?", "ï ?", \
"ï ?", "ï ?", "ï ?", "ï ?", "ï ?", "ï ?", "ï ?", "ï ?", "ï ", "ï ?", \
"ï ", "ï ", "ï ?", "ï ?", "ï ?", "ï ?", "ï ?", "ï ?", "ï ?", "ï ?", \
"ï ?", "ï ?", "ï ?", "ï ?", "ï ", "ï ?", "ï ?", "ï ", "ï ¦", "ï ª", \
"ï ¯", "ï \.b2", "ï \.b3", "IgnoringInactive", "ImageApplyIndexed", \
"ImageCollage", "ImageSaliencyFilter", "Inactivate", "Inactive", \
"IncludeAlphaChannel", "IncludeWindowTimes", "IndefiniteMatrixQ", \
"IndexedBy", "IndexType", "InduceType", "InferType", "InfiniteLine", \
"InfinitePlane", "InflationAdjust", "InflationMethod", \
"IntervalSlider", "ï ¨", "ï ¢", "ï ©", "ï ¤", "ï \[Degree]", "ï ", \
"ï ¡", "ï «", "ï ®", "ï §", "ï £", "ï ¥", "ï \[PlusMinus]", \
"ï \[Not]", "JuliaSetIterationCount", "JuliaSetPlot", \
"JuliaSetPoints", "KEdgeConnectedGraphQ", "Key", "KeyDrop", \
"KeyExistsQ", "KeyIntersection", "Keys", "KeySelect", "KeySort", \
"KeySortBy", "KeyTake", "KeyUnion", "KillProcess", \
"KVertexConnectedGraphQ", "LABColor", "LinearGradientImage", \
"LinearizingTransformationData", "ListType", "LocalAdaptiveBinarize", \
"LocalizeDefinitions", "LogisticSigmoid", "Lookup", "LUVColor", \
"MandelbrotSetIterationCount", "MandelbrotSetMemberQ", \
"MandelbrotSetPlot", "MinColorDistance", "MinimumTimeIncrement", \
"MinIntervalSize", "MinkowskiQuestionMark", "MovingMap", \
"NegativeDefiniteMatrixQ", "NegativeSemidefiniteMatrixQ", \
"NonlinearStateSpaceModel", "Normalized", "NormalizeType", \
"NormalMatrixQ", "NotebookTemplate", "NumberLinePlot", "OperableQ", \
"OrthogonalMatrixQ", "OverwriteTarget", "PartSpecification", \
"PlotRangeClipPlanesStyle", "PositionIndex", \
"PositiveSemidefiniteMatrixQ", "Predict", "PredictorFunction", \
"PrimitiveRootList", "ProcessConnection", "ProcessInformation", \
"ProcessObject", "ProcessStatus", "Qualifiers", "QuantityVariable", \
"QuantityVariableCanonicalUnit", "QuantityVariableDimensions", \
"QuantityVariableIdentifier", "QuantityVariablePhysicalQuantity", \
"RadialGradientImage", "RandomColor", "RegularlySampledQ", \
"RemoveBackground", "RequiredPhysicalQuantities", "ResamplingMethod", \
"RiemannXi", "RSolveValue", "RunProcess", "SavitzkyGolayMatrix", \
"ScalarType", "ScorerGi", "ScorerGiPrime", "ScorerHi", \
"ScorerHiPrime", "ScriptForm", "Selected", "SendMessage", \
"ServiceConnect", "ServiceDisconnect", "ServiceExecute", \
"ServiceObject", "ShowWhitePoint", "SourceEntityType", \
"SquareMatrixQ", "Stacked", "StartDeviceHandler", "StartProcess", \
"StateTransformationLinearize", "StringTemplate", "StructType", \
"SystemGet", "SystemsModelMerge", "SystemsModelVectorRelativeOrder", \
"TemplateApply", "TemplateBlock", "TemplateExpression", "TemplateIf", \
"TemplateObject", "TemplateSequence", "TemplateSlot", "TemplateWith", \
"TemporalRegularity", "ThermodynamicData", "ThreadDepth", \
"TimeObject", "TimeSeries", "TimeSeriesAggregate", \
"TimeSeriesInsert", "TimeSeriesMap", "TimeSeriesMapThread", \
"TimeSeriesModel", "TimeSeriesModelFit", "TimeSeriesResample", \
"TimeSeriesRescale", "TimeSeriesShift", "TimeSeriesThread", \
"TimeSeriesWindow", "TimeZoneConvert", "TouchPosition", \
"TransformedProcess", "TrapSelection", "TupleType", "TypeChecksQ", \
"TypeName", "TypeQ", "UnitaryMatrixQ", "URLBuild", "URLDecode", \
"URLEncode", "URLExistsQ", "URLExpand", "URLParse", "URLQueryDecode", \
"URLQueryEncode", "URLShorten", "ValidTypeQ", "ValueDimensions", \
"Values", "WhiteNoiseProcess", "XMLTemplate", "XYZColor", \
"ZoomLevel", "$CloudBase", "$CloudConnected", "$CloudDirectory", \
"$CloudEvaluation", "$CloudRootDirectory", "$EvaluationEnvironment", \
"$GeoLocationCity", "$GeoLocationCountry", "$GeoLocationPrecision", \
"$GeoLocationSource", "$RegisteredDeviceClasses", \
"$RequesterAddress", "$RequesterWolframID", "$RequesterWolframUUID", \
"$UserAgentLanguages", "$UserAgentMachine", "$UserAgentName", \
"$UserAgentOperatingSystem", "$UserAgentString", "$UserAgentVersion", \
"$WolframID", "$WolframUUID"}
