Actually when it comes to 720p and 1080i. I can tell a huge difference, case in point when i'm watching a basketball or football game on a station that is being broadcasted in 1080i vs 720p I can immediately notice a much more smooth and less choppy picture on 1080i rather than 720p. So to answer your question. Personally Yes I can. I know I compared 1080i to 720p, however same concept really.
I have the reverse problem. When viewing 1080i sports its pixel hell for me on my 1080p set. 720p looks substantially better. I watched a CBS football game where it was snowing this last year and had to shut it off it was so bad.
Ultimately, 1080p on a 1080p set will probably deliver the best picture for fast motion games, the rest will likely look the same. Interestingly enough, the picture quality in my market was going to hell in a handbasket not long ago. Enough people had a fit and bang - better picture. Not sure what they did (equipment reset) or if they were testing adding another channel to the spot beam to see if people noticed and enough of us said "Oh hell no", but during the BCS I was going crazy on DirecTVs local picture quality - "Garbage in = Garbage Out".
Edited by Skyboss, 12 March 2010 - 06:26 PM.