Where's the pen (or stylus) to go with it ?
I mean, really, this is the one thing which for me would make it a no brainer. Multitouch is cool and all, but if we're still going to be stuck with silly keyboards that's just stupid. Why can't we just write on this thing ?
Question which comes close after: can I develop my own apps (probably) and put them on my own and friend's devices without having to pay extra (unlikely) and without going through the appStore (very unlikely) ? This is still my biggest gripe with the iPhone. You buy it but it's not really yours. If the iPad is the same it really loses out against the 13" MacBook Pro.
Very unlikely to buy this unless one of the above questions gets a positive answer.