akuma587 said:
I do agree that the TV itself makes more difference than whether or not it is 1080i vs. 1080p, but this also makes several assumptions.
1) Your TV is properly deinterlacing the signal (the one I was using in my earlier example was a very old TV, and was not). 1080i and 1080p will look more or less identical only if this is true. If not, there will be a major difference. His TV sounds like it is much older, so it is probably not doing this correctly, as it is a much more common feature on newer TV's.
2) You aren't taking advantage of a 120 hz TV which when in conjunction with some of the anti-judder/smoothing technology makes a huge difference, especially in film.
The TV itself makes the biggest difference, I agree. The contrast ratio (which can vary a lot from set to set, I am about to buy a TV with a 50,000:1 ratio) is a huge factor. The ms response time has a small effect, but for film it is kind of neglible.
HDMI cables provide some advantage too, but once again this is sort of negligible unless you are going for a 1080p 24fps signal. In general they are the better choice though.
So yes, on TV's that can display both 1080p and 1080i correctly, the difference is minimal. But on his setup there is most likely a major difference between 1080i and a TV that is deinterlacing properly.
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You might notice slightly less stuttering on a 120hz set, but you'll probably have to strain your eyes to pick it up.
We can agree that most of it is up to the television itself. Like you said, if it's not deinterlacing properly or the quality of the TV is generally low, you're not going to appreciate the full effect of Blu-Ray.
For me, the most impressive part of Blu-Ray is the sound. The picture is slightly better but it's not leaps and bounds better in most films. Pixar's films (and a few others) look fabulous, though.
The biggest hurdle for Blu-Ray is going to be peoples' ability to understand and properly set up an HDTV system... And that's a huge fucking hurdle. Most people just don't know enough or care enough to get the most out of the format, and that will probably hurt it in the long run.