I am happy with N900 and don't have any plan to upgrade for another 2-3 yrs unless Nokia release its bigger cousine of N900 having

1) AMOLED Bigger screen (4.5-5 inch) with multi-touch.
2) Bigger Camera (around 12MP with XEON flash with Camrea Shutter)
3) HD Video recording with minimum 30FPS
4) Faster Processor around 2GHz
5) It has be a MeeGo. Symbian is for novice users
6) It should have "Home", "End", "Tab" and "Delete" keys