Here's 1 company in UK launching a tablet which is literally a computer
Small form factor & 10"screen as well. Runs on XP, Win7 or linux, with USB ports, cam, multi tasking & Flash support.
Batt life i wudn't expect it to out last the iPad since its running Atom & full fledge OS instead of phone or web OS.
iPad wud only be a huge success if Apple can provide some very unique content. Otherwise it wud be juz another gadget, like apple TV. I can already imagine commuters reading newspapers, cracking the Sudoku codes, reading a book & iPad-ding