Actually, it's always a good topic.
The display itself can produce 1080P native resolution.
Compatible resolutions for the television include the 480i/480p, 720p, and 1080i/p.
It will take whatever signal you give it and upconvert it to 1080p. If you have a 1080p source, however, it's best to send the signal over closest to the resolution display of your panel. Less upconverting = less processing = better picture. So changing the output resolution on any of your peripherals (Blu-Ray, PS3, Xbox, cable/sat, etc.) to the hightest output will usually give you the best results.
Your blu-ray player will be displayed at a 1080p, but you have to make sure the player is set to output at 1080p. You will set that in the menu settings of the blu-ray player once you get it. HDMI is a great solution for that as well, because with HDMI, the signal remains digital from the source to the television. Component cables would cause the transfer to go from digital to analog, back to digital. While the picture wouldn't be dramatically compromised, HDMI is simply better all around.
We're here, so if you have any other questions, just let us know.
Thanks for your support of Samsung products!
First post here so I'm sure this has already been covered and is probably pretty basic but my new Samsung PN50A550 HDTV has Input Video Formats of 480p, 480i, 1080i, 720p even though it is a 1080p display. Will my Blu Ray player (arriving this week) be displayed in 1080p? and if not will the picture be comprimised? Also I will be hooking up via HDMI. Thanks again