If Apple have proved one thing, it's that their iPhone/iPod form factor is a winner. It's a perfect compromise of dimensions. I am hardly surprised to see Nokia take heed of this.

Personally, I liked the N810 dimensions. The screen really did seem 'big enough' to be a convincing UMPC (or whatever nomenclature-du-jour you prefer). But with the same resolution and better acceleration, I can see how the 3.5" N900 can still look great - it certainly seems very readable in the demo videos.

If the device has a POSIX-compliant OS that you can SSH into, you're way beyond mere 'smartphone' technology.