This forum was, in my understanding, initially established with the 770 launch. It has not covered (except as competitors) Zaurus, Apple, Palm, HTC, Archos, or even other Nokia devices with reasonably equivalent hardware, but differing in OS. While the tablet hardware has been consistently high-end (770 at launch, and N800 and N810 up through the N810 launch, if less so now, and the N9xx at its launch), the hardware has not been hugely differentiated from other devices. Even the screen resolution is no longer different from some competitors, and with Opera, many of them do a passable job as tablets that access the internet. MIDs are coming out now too, and while their x86 architecture does hurt them powerwise, they're also tablets with access to the internet.

Yet (whatever the reasons) these fora are not, in fact, providing primary coverage of them; they're relegated to "competitors". Since these fora are covering Maemo, it's not indicative of any change of direction, much less one dictated by Nokia, that they should merge with maemo.org.

Essentially, your complaint seems to be rather late, as it is actually against the established focus, not the name change.