More completely wrong info! 1080i scans 1080 lines. 720p scans 720 lines. 720p displays all 720 lines in one sweep of the screen. 1080i displays 540 in the first sweep, then 540 more in the 2nd sweep to complete the 1080 lines. 1080i is NOT 540 lines overlapping. It is interlaced scanning vs progressive. I hate to keep typing the same info in discussion after discussion... For the sake of argument, lets talk about 720p as displaying lines 1-7 for a second. The monitor would display them as follows: Line 1 Line 2 Line 3 Line 4 Line 5 Line 6 Line 7 All of the above would be done in one pass, progressive, to fill the screen with one full frame of info. Now, lets talk about 1080i as displaying lines 1-10 (because it has more lines total than 720p does). The monitor would display them as follows: First pass: ---------- Line 1 Line 3 Line 5 Line 7 Line 9 THEN, second pass: ---------- Line 2 Line 4 Line 6 Line 8 Line 10 All of the above would be done in two passes, as indicated interlaced, to fill the screen with one full frame of info. This is done so fast that the human brain cannot detect it is happening. This is why movie pictures and TV works. With the exception of some folk who are particularly sensitive and get headaches or have seizures (rare), we simply cannot see the interlacing happen. Thus... end result... 1080i displays a higher definition image than 720p. Period. It just displays them differently. Another example is dealing cards... Cards are dealt in an interlaced format! Each player does not get all 5 (or whatever depending on the game) at one time, but rather each player gets a card before anyone gets a 2nd card or a 3rd and so forth. It doesn't affect at all the number of cards dealt. Everybody gets all their cards. 1080i gives more information than 720p. It just displays differently. The reason why 1080i is a supported format: 1. Because it works, and the human brain cannot see the interlacing! 2. It can be done using less bandwidth than a progressive picture would. Sure 720p at 60 frames might look better than 720p at 30 frames.. but most of those 30 more frames are identical information, and not new data... So yes, 1080p if it ever happened might look better than 1080i... but the reality is, 24-30 frames per second is all that is needed for motion. Film is only 24 frames per second, and you don't hear folks in the movie theater complaining!