The UX must be consistently slick
This point is useless, the entire number 4 in your post. First of all, if you're using it as a point, you've never used a Windows Phone. It's as stable as an iPhone (certainly moreso than Android), I've had one since April and have never had a crash, lockup, or misplaced UI element. You seem to be bringing that from Windows Mobile, which is hands down the biggest thing holding Windows Phone back right now. Technical people who cannot and will not distinguish between it and its unrelated predecessor.This argument pisses me off because it's completely unfounded, yet I constantly hear people saying "Well, I have my doubts since it's a Microsoft product" without ever using it. The biggest hurdle to Windows Phone 7 is ignorant techies casting misinformation to the general consumer just because bashing Microsoft is a fun talking point.