Todd,

Ahmed is correct, we have not yet supported display of Tabular in cloud notebooks. Currently, Tabular is always rendered in its summary form. All of the kernel related functionality and methods still work as documented. If you want to visualize it you will need to specifically Rasterize it as Ahmed also suggests.

The https://reference.wolfram.com/language/ref/Tabular.html page and associated values in WolframLanguageData will be updated soon to correctly reflect the cloud support status. Example: WolframLanguageData["Tabular", {"CloudSupportStatus", "CloudSupportNotes"}]. We are actively developing this and thanks for reaching out here on community, that helps us prioritize implementation of cloud features!