Not totally true, at least for me.
Of course I'd like to see harmattan on the n900, but I'll survive happy and will not consider my new device a brick only if maemo5 will get upgrades and enhancements.
I'm speaking about ovi maps 3, umts/skype video calls, flash player upgrades, phone enhancements (like the easy differentiation of ringtones per group/user).
But it seems that ovi maps 3, for example, is scheduled for harmattan only, that's the only reason of my interest in this thread!

My2c.

Niko