[DickY]

Since I got my HDTV last year I rarely watch anything that is not HD. Discovery Channel HD programming is fabulous. A lot of info can be found on CNET.com. Here is a quick thing on the two 1080 types from CNET.

Resolution, or picture detail, is the main reason why HDTV programs look so good. The standard-definition programming most of us watch today has at most 480 visible lines of detail, whereas HDTV has as many as 1,080. HDTV looks sharper and clearer than regular TV by a wide margin, especially on big-screen televisions. It actually comes in two different resolutions, called 1080i and 720p. One is not necessarily better than the other; 1080i has more lines and pixels, but 720p is a progressive-scan format that should deliver a smoother image that stays sharper during motion. Another format is also becoming better known: 1080p, which combines the superior resolution of 1080i with the progressive-scan smoothness of 720p. True 1080p content is scarce outside of Blu-ray, HD DVD and the latest video games, however, and none of the major networks has announced 1080p broadcasts.