Sources: Sony , 
quote: 512-bit wide memory was done many years ago so it can be done again today at a lower expense.
quote: Do you not want to enjoy high details and no detectable jaggies? The fact that your GPU has to blur out diagonal lines to make it look better on a low res screen should tell you that screens are really the bottleneck in graphics.
quote: Then you have to run AA to get rid of the jaggies. You take a hit in performance.
quote: The Ipad4 can run Infinity Blade II beautifully at its retina high res and sips power. The hardware driving these have 20x the power envelope to work in, they will figure it out.
quote: OMG, the point is if a little chip on the ipad can push 3MP at under 8W, then a graphics card running 70-250 watts can easily push a 4K screen without much problem.
quote: You clearly did not even read the previous posts.
quote: OMG, the point is if a little chip on the ipad can push 3MP at under 8W, then a graphics card running 70-250 watts can easily push a 4K screen without much problem. 70-250W is what a desktop mid-high end discrete graphics card will use.There are a GPUs that are already capable of pushing the latest titles on 3X1080p or 2x1600p
quote: If 4k was standard for desktop monitors, every one would need a dual GPU set up.