I just saw the movie "300"'s trailer in 1080i. On my computer. I have a 24" LCD, so it is the full 1080i. Makes me want to get a Blu-Ray player for my computer. Like. Now.
I'm pretty happy with 720p, but my screen only does 1680x1050
IMO the bitrate has a lot to do with it too.
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)