The N900 was a real Linux phone. In fact I used that phone for two whole years, I have never used a phone that long.
There's only so much you can do with it, at least in a practical sense.
and the N8/808 got more apps and much better camera
FM Transmitter, HDMI, USB2go...
The N900 was no flagship, it was The Linux phone. Good specs for it's time, but no flagship at all.
I only got my gut feeling, and it tells me that something cool is brewing over at Samsung/Intel camp