Reasons I'm glad the N900 isn't like this:

1) doesn't have a keyboard

2) too big to be a phone (4.3", maybe 4.5" is about as big as I'd go), and yet too small to be a mid-range (netbook, umpc size tablet, etc.)

3) no dpad (nor arrow keys)

An Android or Maemo tablet at 9" or 10" -- yes, good. Even without a keyboard (as long as it'll take a USB keyboard, and hook up to a KVM). A 4.1"-4.5" Android or Maemo phone (with physical keyboard) -- yes, good.

5" non-phone no-keyboard tablet? No thanks. Not even with Android or Maemo.