Having seen the basic premise of the Windows Phone 7 series I fully understand why the Windows Marketplace (for version 6.x) only has about 300 applications. The new phones finally push the bar for Windows Mobile platform in a significant way. While I to applaud the Zune like interface it really takes the phone into an Apple centric design philosophy i.e. No bare bones, blank canvas designs for third parties, but they give you exactly what you need for the full social phone experience.
What I am looking forward to: Full Xbox Live Integration, Zune Integration (another reason to get a Zune pass), Zune HD like user interface.
I just purchased the android so this will be a hard sell to get Win Pho 7 but