HDCI, High Definition Component Interconnect. Required for playing HD thru a Hi-Def DVD player (Blue-ray, etc).
1) It has video AND audio thru a single cable. VERY NICE!
2) A computer with a DVI-style video connector can connect directly to the HDMI-equipped HDTV. Audio will have to come from the computer's sound card. Still Quite Nifty.
I'm blown away at how many 720p LCD's are being sold nowaways. Looking at a Circuit City or Best Buy ad on Sundays shows very few 1080i/p sets. You'd think everyone would demand at least 1080i as they toss $1200 at a TV, but I guess not. Then again, so many people think that Pennzoil makes sludge.
I'm quite happy with my Sanyo 32" HD 1080i CRT-style TV for $577. HDMI and HDTuner built-in.