On CNET Tv there is an interesting article about this. It seems 1080i and 720p are very close in quality of picture. But I'm not sure if any or one of the displays(brands) out there will switch to 720p if 1080i is unavailable. I come away from that segment and all my researching that 720p is actually better because of the progressive scan instead of interlace. I also find that each display is rated accordingly. Certain models have native 480p(not too many anymore)some 720p,some 1080i and then 1080p. But all will accept the varying signals. Thus some models not having clarity in their imagery. According to Cnet 720p is all anybody would or should need unless you plan on HDDVD or Blueray.
I am in the market for a HDTV. I noticed that some of the specs list that the TV is 720p. Does this mean that it does not use the 1080i format and coverts the 1080i format to 720p? I noticed this with the less expensive models and I am beginning to think that is why they are so cheap. Can you please clarify? Is the 1080i format native to all HDTV's?