Psyberius on 26 June 2013
http://www.videocardbenchmark.net/high_end_gpus.html
Go there. See the difference of power vs price? I can tell you from actually having an $800 card and a $300 card out of that list that the differences in any reasonable metric are impossible to even see.
There is a point of diminishing returns when it comes to graphics now. You could put 3x the current hardware in a PS4 but it probably wouldn't make the product it provides even 10% better.
