What's the biggest difference between this and a regular tablet running linux (I'm not sure they exist but I'm assuming most android tablets can run any Linux?). Is it the addition of GPIO, or somethinbg else?
> I'm assuming most android tablets can run any Linux
This is definitely not the case. There are almost no android tablets that people have even bothered figuring out how to boot normal linux on, and I'm not sure there are ANY that have complete driver support.
Other than this your best bet would probably be to try to find an x86 tablet from 5 years ago and even those are a huge pain to use linux on.
So the point of the device is to be able to develop pi stuff which is then most likely used on a regular pi when deployed? Am I interpreting that right?