yoda-sama said:
Quick response to your topic derail: With my old 720p projector I expected to see pixels fairly easily at the size I was throwing, so I overlooked them easily enough, but when I got my 1080p projector I'd really hoped at my usual distance that it would be comparatively smooth as silk, but as improved as things are on this projector, pixels are still pretty obvious (though smaller) yet in some ways worse since I both expect not to see them (so they stick out when I do) and they're inherently sharper. I'm taking the bad with the good on it, but do think that, for projectors at least, higher resolution [hardware] would be very beneficial regardless of content (meaning 720p, 1080p, etc. will look however they'll look, just not hindered further by visible pixels, but badly compressed 4K video is certainly not something that'd be welcome). Displays should improve (even HDTV's, since if they're used as large monitors, 1920x1080 isn't all that great to be stuck at), but content standards should be more carefully thought out than this gimmick-driving hamfisted approach of late.
On topic, I may need to double check this when I next get a chance, but in the opening battle when the Star Destroyer is approaching the camera (chasing and firing on the Tantive IV), I believe I saw a slightly darker circular patch in it as it moved, possibly a compositing anomaly, maybe a color issue... If that isn't enough to go on, I can watch it again when I get home and be more specific.
I'd say it is an issue with your projector. Pixels are not visible at 1080P at recommended seating distances unless the projector in question has screen-door issues. We use a 3metre wide screen and pixel structure is not discernible at THX seating distance even with my 20/12 vision. with a 7ft (2m) wide screen the pixels would be around 7/160th of an inch (1.1mm square) Some projectors have larger black borders around pixels that make things worse though.
However the compression macro-blocking and 4:2:0 colour compression can make things much worse. Uncompressed 1080P looks much much better than BD25 movies.
Avatar is the movie with the least compression problems I have ever seen, but then they did dedicate the entire disc to just the movie, no extras or fancy menus, and it looks great (2D version)