[FanIn80]

Originally Posted by cal_guy

Some of the pickiest people have found that Zune Video on the Xbox offers good quality. I've personally found that the video looks good even on my relatively pedestrian 5 mbps.

http://www.avsforum.com/avs-vb/showthread.php?t=1191057

If you read through that thread, you'll notice that most people were not actually getting 1080p. Zune will stream content to you according to your internet connection. It has a bar/logo/text system to show you which level of compression you are currently receiving. 1-3 bars are various levels of SD, the HD logo means 720p and the 1080 text means (obviously) 1080p.

The people in that thread had some combination of 1-3 bars + logo, meaning they were getting 720p at the most.