Apparently, 3GB is falling down on the job at 4K for some games. No, its not yet mainstream - but Seiki has the 39" 4K at around $650 and ASUS is expected to release their 39" 4k early next year, quite possibly in the under $1000 range. It was due 3Q this year, but probably got put off to include G-Sync. I am holding out for the ASUS because it refreshes at 60Hz whereas the Seiki is only 30Hz because they couldn't be bothered to include a Display Port connector. And, from a computational standpoint, the more memory the better. For me, 12GB sounds really nice. I have 32GB of 2400Mhz for my main memory, only 3GB for the graphics is a bit small. What's weird to me is the 384 bit interface instead of 256 or 512.