Confirming our earlier report, Sony has unveiled a 4K OLED TV at CES 2013. The prototype Ultra High-Definition display is 56 inches in size, and marks Sony's return to active OLED TV development after releasing the first commercially available set back in 2007. The version we saw on the show floor is crisp, vivid, and quite frankly, one of the most beautiful displays we've seen, with nary a pixel in sight. It's just a prototype for now, so we don't expect a price or release date any time soon, but we're willing to bet that this gorgeous marriage of OLED and 4K resolution will break the bank when it first hits stores.