So what you are meaning are 60 fps interlaced and progressive video files? Do you really know what those are?
Yes. BTW, 60 "fps" is an odd way to refer to interlaced content since fps usually refers to frames per second.
Ok you list three features for supported formats (containers and codecs).
1: File container features: What is it that the PS3 media player cannot do that other media players do?
I listed them. Should I quote myself?
2: I have never had any problems seeking with the PS3 media player. Regarding performance, there does not seem to be any problems playing DF's 60 fps 720p videos. Do you have access to any 1080p 60fps videos that we can test?
I have problems when playing high-bandwidth files over the network. Problems that I don't have on my laptop in the same room. Both are connected to the same 802.11n WAP through a switch. These problems are aggravated by seeking.
3: If the image different media player spits out differ differ, one (or both) of them is faulty. Image quality (vibrancy of colors, black levels, no ghosting etc) comes from the display, and a video player decodes the images and send them to the display.
Not necessarily. Scaling and color conversions (SD and HD content have different color standards) are two areas that can have a noticeable effect on picture quality.