It took a good while for Android to shake off the "no apps" image. WP just needs enough users to make the main apps worth porting and I think it'll get there. I love the look of the Nokia handsets. Though I guess some of that is Nostalgia as Nokia were the only phone maker you wanted a phone from 10+ years ago.
I'm not tied to an eco system really even though my last 2 phones have been Android (HTC Desire and now Samsung Galaxy Nexus), I'll just go for the best handset when it comes to upgrade time.