what makes you think wp8 won't work on lumia 900? it's just a marketing issue.
Because 7.8 is not really a big deal. Just look at it, new homescreen and what? Nothing. WPH8 have diffrent kernel, it only looks the same.the porting of 7.8 has been very simple for devs, i think that we have serious possibilities to see WP8 on hd2!
according to htc and microsoft, hd2 would not be able to run wp7, is that true ?
Well, if the rumors are true, HTC could will release the HTC Rio, a WP8 device witch same specifications that HTC HD2. In this case, HD2 can update to Windows Phone 8 witch the help of developers.
Cotulla Hacked WP8 http://twitter.com/CotullaCode/status/274145147393040384/photo/1. We are truly impressed of hacking speed. Waiting for Mozart rom