Re: Untrustworthy Microsoft
Sony will almost certainly fight back for a while, they've already had a pretty hard lesson in bad PR over rootkits and PSN network hacks, so they won't want any more of the same over DRM if they can avoid it.
All they have to do is hold out until M$ cave and game sales tank on their platform. After that they can say "told you so" to the content owners and claim the moral high ground again.
Frankly, I'm surprised that M$ even thought their DRM restrictions were going to fly, they've been trying for 15-20 years and the consumer has repeatedly shown they won't have anything that's too restricting (unless I've missed massive sales of PlaysForSure devices somewhere). They're more or less ok with things that prevent casual copying, but as soon as you start telling them they can't sell it on or loan it to friends and family then it stays pretty firmly in the shops.
I don't think either M$ or Sony will turn on DRM now, it'll completely kill sales of the console and games in under six months if they do, handing the win to the other side. The only time you could do it is once it's end of life and the new model is out - at which point it's just going to look petty and spiteful.