Maybe you're not understanding, but 4K on these consoles is nothing but a gimmick, a marketing ploy to get you to buy the new hardware. Currently, the only dedicated graphics cards that can natively run 4K games are priced over $500, and to run a game at 60fps you'd have to buy two of these, and they would actually still struggle to keep a constant 60fps on certain games.
Maybe you didn't know this, but video game graphics are watered down so that consoles can play them without melting down, even after that they can barely play at 1080, even less 60fps. Don't kid yourself. The only way these new consoles can play at 4K is by upscaling ugly 720/1080 graphics. It's not true 4K and it never will be.
Dude, save your money, unless you really need 1080 60fps, which in itself will make a minute difference in your gaming experience as far as consoles go.