To be honest. I am positively surprised about the positive "W7 only" feedback we recive here.
I was expecting a lot of bashing and moaning.
Sometimes it is nice to be wrong.
Yes, in general I think people are looking forward to W7. Note that I'm not bagging XP - it has been around for some time and is arguably one of Microsoft's most successful OSs. It has been around since 2001 (18 months ago for SP3), and has been in 'extended phase' support since April this year. If the timelines of zicoz are close for MPII 'final' (late 2011/early 2012), then the support for XP will be nearing the proposed termination date of April 2014.
W7 is using similar software technology to Vista, only refined and more stable. W8 will likely be using similar technology as W7. So why not marry MPII with an OS technology that will be around for several years? Makes complete sense to me.