Well how is it an excuse? We don't know that yet.... For all we know it may be coming in PR1.1 or 1.2 similar to N900. I dont see how it solidifies anything, its just an alternative until/if support comes.
You were making the assertion that no apps from Maemo5 will run on Maemo6. Unlike what is the case for older iterations of iOS or Android. It certainly seems like at least some from Maemo5 will. That's the only point I was making... I'm not trying to argue backwards compatibility is way better, far from it. We know the reasons why that is most probably not the case.
Good point, I forgot to mention that. Do you know what the specific issues are that these 'some' have?
Crap. A lot of people with Android Bionic (which uses pentile AMOLED too) are complaining (not overly.. but still..) about the pentile tendency to make the screen wonky whenever you look at it while it's moving, whenever you scroll small things around on the screen and also has problems with clarity of small text, especially white text on black and there's some kind of problem with color gradients--like it blocks certain shades. Does the N9 exhibit any of that? Of all the nitpicking complaints I've read on here, I don't think that anybody's mentioned any of that so far. Apparently, pentile displays are cheaper to produce and possibly better on battery life at the cost of some visual weirdness like the stuff mentioned above but then not all pentile displays are the same with the same problems. Anyway, as reference: http://en.wikipedia.org/wiki/PenTile_matrix_family