The keyboard question will be interesting. I've got an iPad and shelled out the $100 to get a keyboard cover (the Logitech one, where I curse its lack of an escape key sometimes). For general use I don't need a dedicated keyboard and/or the on screen keyboard is fine, but the two problems that the onscreen keyboard has are the fact that it covers half the screen when it appears, and it has some really long multi-key sequences for some characters. If I'm composing email or working on an ssh session I definitely prefer the hard keyboard.

So I'd certainly guess there is a product here, between tablets and laptops, and it will be interesting to see how the Surface fills that role.