I try to call this function and it tells me that it is not available in the cloud currently. If I upgrade and get access to the Desktop( with the non local files) will I be able to call this function?

Also what is the scope of this function? I take it to mean that I can take a document, import as plaintext, then turn it into semantically salient units that wolphram alpha produces.

I have used semanticInterpretation and it does exactly what I would like to systematize, which I am hoping that SemanticImportString does.

Also, is the Desktop faster than running it through the browser?