Those are my personal opionions:

Pro:
HDMI + 720p
Xvid/Dvix support
Nice camera but let's see how it works
Battery life (But I do not belive 4 days of discrete uses, maybe standby)

Con:
Screen too small, 4 inch would have been far better with this camera and media attitude
CPU slow - But we need to put it on the test before giving a real opinion
No hardware keyboard... that is a pity... I love n900's...
It is thick compared to Nexus and Desire
and then the worst of all:
SYMBIAN. I saw the videos... it looks like a 5 years old OS already...

Anyway I am not buying it, I love my n900 for multimedia and I like light and snappy Nexus as my phone... I will upgrade it only for bettere CPU performances and bigger screen... and off course a major OS, which might include meego but defenitly not include Symbian... of any edition...