I remember having this discussion on this site before.The consensus was that it is very probable the console will run games at 4K, if not 4K, then 1440p or 1600p downscaled to 1080p, but only if the console releases after 2018.I honestly agreed with that, but recently I don't think the adoption rate of 4k is going to be big enough for that to happen.
Also you DO need AA at 4k if you want the best IQ, while 4K greatly reduces the need for AA compared to 1080p, at that resolution there is still some pretty visible jaggies while moving, I use DSR at 120%(5K) and Sweetfx's SMAA at default settings to have a jaggy-less crystal clear picture.I do believe though, that if consoles ran games at 4k they wouldn't use AA and would instead use those resources on something else.
