I wrote a couple of blog posts on this, but here's the summary: My secret hope is that it has an eInk screen that slides down to reveal an LCD, at which point

I wrote a couple of blog posts on this, but here's the summary: My secret hope is that it has an eInk screen that slides down to reveal an LCD, at which point the eInk acts as a reconfigurable keyboard for netbook-style interaction. I'm also wondering if it might instead have a couple of 7" screens arranged Nintendo DS-style (that would add up to 10"). You could, in a pinch, run unmodified iPhone apps on one screen with a keyboard and/or dock on the lower screen. And it would make a great two-page-at-a-time eBook reader. I also think mobile videoconferencing might be a feature that's given a major push, since MacBooks don't have built-in mobile data connections and iPhones don't have user-facing cameras.