I just listen to podcasts like windows weekly, they been saying it for months, blogs etc, but, also were a lot people claimig that it would be upgradable
but I personally did not expect you would be able to upgrade, becuase I was thinking the the phone was also going to try and use the same core as win8, so the phone would be different and current phones most likely would not have the grunt to really do it, but i did expect if the phone was more like "windows" that they would be able to still run the old apps but if you google you will see people saying will not be upgradable from mid to end of last year, while others saying that MS could not cut off wp7 people becuase would kill the phone off
