I want a lot of social features to be built into the tablet reading experience.
If I'm reading a book I want to see where my friend left off, or I want to be able to leave a voice annotation around a chapter so if a friend stumbles upon that chapter they can listen to what my thoughts were around that area. I want rich media incorporated into my books. I want the ability to go out and look up instantly on Wikipedia what something means or see pictures or video around that. That doesn't exist today.
Lending digital books is something that we should all be able to do, too. And if my friend doesn't give the book back? I would click a little button that says "Request book back" or "Rip book out of friend's e-book reader," and digitally transfer it back to me.
NEXT: Matt Mullenweg