Videogames, HDTV and Widescreen 16:9?

Swerbo writes "I've been thinking about buying a widescreen HDTV-ready television for quite some time now, but being the geek that I am, I'm more interested in playing video games on it than on watching DVDs or HDTV. I couldn't find much on Slashdot about this (except some material on the new GTA3/VC box set), and most of the info on the Net is superficial or fact-based such as which games are available in 480p, 720p, 1080i, and/or 16:9. So, I couldn't think of a better place to ask: Has anyone been playing video games on HDTV and/or in 16:9 widescreen format? If so, what have your experiences been? Is it awesome? Does it suck? Does it justify the additional cost of an HDTV just to play 4:3 using 480p (since not much else is supported yet like 720p or 1080i with/without 16:9?) Or does your framerate drop and the games get choppy? What's the availability of HD games on the various console platforms, and why don't more games handle native 16:9 widescreen format (with extras like side-by-side split screen rather than vertical split-screen)?"