Okay, recently, I have had the opportunity to go and play around with a 42" Plasma Screen TV. So what was my first thing? To go grab my two HD-capable systems (The Gamecube and the XBOX) and plug em in. Here's my compare/contrast review of both the Gamecube and the XBOX in the HD realm.
Specs for you spec geeks:
Phillips 42PF9956 FlatTV Plasma Screen TV
Bose 1-2-3 GS Sound System
Nintendo Gamecube with RCA Output
Microsoft XBOX with RCA Output
Okay, now to the reviews. I've picked 5 games (Two XBOX, Three Gamecube) to show off, all major titles from big developers. All of them (Excluding one of the Gamecube) are labelled as HD supporting or are insinuated as such, and all of them were run in Widescreen mode.