Given that half of the drivel are categorically either baseless claims, continued MS (aptly labeled M$) nerd drama or a dislike of Ballmer (he does come off as trustworthy as an used car salesman), you will have a hard time finding arguments for or against this new direction beyond the aforesaid reasons. That's, of course, not 100% true, but common sense is giving way to conspiracy theory and MS hate for some reason.
I've officially taken a "wait and see" stance. Despite that, I've also stated that I'll buy a Nokia WP7 phone if it were to happen. Now I have to buy one...