How much RAM does it have.
Most apps will still use only a single core, but a lack of RAM is one of the biggest flaws in lower cost tablets. Android really needs 1GB RAM.
Anyway, tablets are useful for very basic computing but is not worth it once you get into the netbook style pricing.
(netbooks are faster and offer more functionality and cost less than most tablets)
For me, the only reason why I have a tablet is because I was lucky enough to get a HP touchpad during the sale. (while it is not as functional as a laptop, it does run android ICS, and webos 3 though I use webos 3 mostly and have been using my other android devices less and less. The webos UI just makes the android UI feel inefficient due to the amount of work needed to perform the same tasks. (if they were to make a proper emulator for android apps (since both OS are linux based, I would completely switch to webos 3, and possibly look for a way to either port the webos UI to my android devices, or port webos over to it)