Well the new console will not be able to do gaming in 4K, its being "nicknamed" the PS4k because it can out put 4k blue ray (like you said it might do) This Gen of Consoles will never be able to achieve 4K gaming visuals, but if you think about the price of a PC that can consistently run games at 60fps, or 30fps for that matter, At a 4K resolution, you might need to rebond your house...
In my opinion the PS4 does what it needs to for me, im just pissed that instead of thinking ahead and having a possible "UPGRADE" to the unit, they just developed an improved model... Which for me is bullshit... A console should last you the generation. Thats the purpose. and I dont want to have worse graphics or lower frame rates, or LONGER LOAD TIMES, i think its complete BS...