From the videos I've seen of Windows Phone 7, it seems like a nice operating system to mess around with, but like it would get annoying for day-to-day use. The transitions with the flipping text would get annoying really quickly, for example. That's just my opinion, and I've never used it so it might be different in actual use, but it just looks like Microsoft is trying too hard to out-Apple Apple.
EDIT: Sorry, forgot to include the part relating to gaming. I'm definitely in agreement with the other posters, it seems Microsoft isn't even putting much effort into advertising the gaming aspect. Gaming plays a huge role in Apple's advertisements, but I can't say I've seen much about Windows Phone 7 at all. They will need some huge, out-of-nowhere bonus to win this battle.
EDIT: Sorry, forgot to include the part relating to gaming. I'm definitely in agreement with the other posters, it seems Microsoft isn't even putting much effort into advertising the gaming aspect. Gaming plays a huge role in Apple's advertisements, but I can't say I've seen much about Windows Phone 7 at all. They will need some huge, out-of-nowhere bonus to win this battle.