I currently have a 50" 720p LG Plasma and am enjoying the AA, contrast ratio and high refresh rate. I've heard 1080 and 4k don't support AA. Any insight here? Post your thoughts/comments and thanks!
EDIT: Wow lots of responses and great feedback! I went with a 55" LG 4k today and WOW. It's like a whole new game. 4k FTW.
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4k with up scaling could cause delay while the tvs engine trys to convert the image. Most tvs have a game most that works to eliminate these factors.