I bought Lumia 900 the day it was released and no, I don't feel it's a "dead-end phone". Given that Microsoft backports many of software features of WP8 to WP7.8 (which BTW was under big question in Lumia 900 launch time frame), I'm even less inclined to think so. Will I be getting WP8 device any time soon, just because it's there? I don't think so - I'm pretty happy with my phone.