I know your not asking me but It’ll probably end up like the Zune. Great niche product (Zune store for the win) but it will be overshadowed by newer iphones and android phones. I love the Windows OS but after using the HD2 a later windows based phone I don’t see how they can compete.
The early reviews seem to indicate a pretty hard break from anything MS has produced in the past. Past products may not be a reliable indicator.