Re:XBox games in 480p+ (Score 1)

Answering my own question. From ABC's site:

I have heard that there are two HDTV formats -- 720p and 1080i. Is there a difference between these formats and can my television receive both these formats? Regardless of the HDTV format being broadcast, all new HDTV receivers can receive both formats. New HDTV televisions will convert any received signal to a format that is compatible with your new display. The 720p format uses progressive scanning, which is just like your computer monitor. Progressive scan offers crystal clear images that virtually eliminates those scanning lines that are visible on most large screen televisions. ABC broadcasts all of its programming using the 720p format except in Dallas, where the ABC station broadcasts in 1080i. Many new flat panel displays use progressive scan.

The 1080i format uses interlace scanning just like today's analog televisions. Scanning lines are less visible on big screens due to the number of lines. Most currently available projection HDTV's use 1080i.