Power users <=> minority
let's see... Audi S8, BMW 760, Mercedes S600...
these are cars full of (not too bleeding-edge) technology, all aimed at top management & the like...
NOKIA communicator? it was THE top manager mobile phone; the last evolution of the communicator series (E7) has a hw kbd too, runs belle...

so why don't we see more S8s, 760s & S600s or communicators?
well, even top managers are customers and if Apple or Lexus come along with a GOOD LOOKING (even though technologically inferior) product and SELL IT WELL, ppl go for it, top management included.

WP <=> main smart-phone OS?
not sure on which planet you have been living (on vacation?) in the past year, but obviously ppl are tired of m@ke$$h!t's crap...
they are simply not buying in it anymore, certainly not if they have the choice... think of it as the US car makers; they sat on their a@@es for too long (even though LostDOS imMobilized was one of the 1st OS to try & compete w/ GEOS / Symbian v6...) and now are playing catch up, even though the comparison is limited in that mobile phone OSes are a different ball game then PC OSes...
well, in a way it isn't... big cars are out, small cars reign and... US car makers have no f###ing clue how to make those

got your drift... you hope the N9 will get an upgrade path to Maemo 2012