Mmm, at the risk of reigniting last millenium's hot topic. . . when did that happen? When TV's started automatically upconverting 1080i to 1080p at high refresh rates?
I've still been hanging on to the idea that 720p and 1080i are roughly equal with exceptions for particular suitability for some content types (like, fast moving stuff like sports is better on 720p). With "true" native 1080p still a very clear "cut above".
1080i has over a million more pixels than 720p. It's just that only half the pixels in 1080i are actually on the screen at one time, but the delay is so small that the human eye cannot perceive it. I hate the fact that most sports are in 720p, I don't care about any tiny bit of so-called motion blur if the picture is going to look like crap in terms of HD quality. I can notice the lower resolution and it looks like crap to me. You can also really tell the difference on tv shows when there are close-ups on faces and such. As far as I'm concerned, anything below 1080i/p is not really HD in my book(yes I know technically it is, but whatever).