15tflops is too little for 4K? really? r9 295x2 has 11.5 tflops. (dual gpu) and the r9 295x2 tears 4k. Easily enough for 4k 30fps and 40k 60fps with PC optimisation, let alone console optimisation. 15tflops would be easily enough to handle 4k.

Apparently the plan for PS4 4K gaming is to support 2560*1440p as the internal res then upscale to 4k. I read that a year or more ago. It will give good results.

And by no means will most games do that. Think Tetris like games.

PS4 can do both, and the only reason it does niether is because Sony has not allowed it to.

http://www.eurogamer.net/articles/digitalfoundry-vs-trine-2-on-ps4 

This article goes in depth on the limitations Sony has enforced via firmware. The System itself can handle 4K/30fps in many situations. Obviously games like God of War or Uncharted will never render at that level, but there is no reason something like Flower, Pixel Junk Games, Arcade Shooters, and many other less demanding titles could not take advantage of the available power.

Honestly, I think the only reason Sony is F******* us over on 4K is because they want to push Morpheus next year, and Bravia is not a money maker. 

PS3 promised me 1080p HD graphics and didn't deliver.
PS4 promised me the same and many of my games don't reach that mark or if it does the frame rate suffers...
PS5.... Before we talk 4K can we just nail 1080p / 60FPS? I'd hate to think of the frame rate with PS5 running 4K.

Just be careful using Teraflops to measure resolution. It's actually a measure of GPU compute power.

Look at ROPs and memory bandwidth.

4K is 4x bigger than 1080p,

PS4 has 16 ROPS, which is already more than enough for 1080p60 (X1 has 8) 32 ROPS should be sufficient.

500GB/s memory bandwidth required, achievable by HBM easily in a couple of years.

16GB will be fine for RAM size, provided the OS reserve stays at 3GB. So you go from 5GB usable to 12GB usable.

I think the only tricky thing is the CPU, and that depends on AMD's next gen Desktop core. If it's not big and power hungry I'm sure a ~3GHz 8 core would be a good fit, giving around 3x performance of current CPU's.

Uncharted 4 targeted 60fps, Naughty Dog said it themselves. In the end eye candy won and U4 is now going to be 30fps in single player, which many of us guessed right from the beginning. The same shit will be going on for a long time since reviewers and more importantly gaming audience don't respect 60fps enough. But a gamer won't boycott, we have seen that many times. There's so much talk but so little action, people could actually stop buying all these 30fps games but they won't, it's so goddamn funny in a sad way. Look at Witcher 3 or the new Batman or any other of the success stories gaming industry has had in the past years. 30fps makes most of them successful, it's that simple.

Compute power of PS5 will be of a high end PC atm, and a high end PC can handle 4k at 30fps. We also have to remember there's no need for AA at such high resolutions which uses up a lot of computing power.

There is a staggering difference between games like Trine and 95% of games in general, that being actual heavy resource usage, trine uses a miniscule portion of resources, as a result using it as proof that the console can run games at 4K is smoke and mirrors, more accurately, it would be "can run a small handful of software at 4k", the moment you do any sort of heavy load on the cpu or gpu that possibility flies out the window, thus using that as reasoning as to why the PS5 will arget 4K for games is flawed.

As i mentioned in an earlier post, the console will be CAPABLE of 4K but only select titles and indies will actually utilize it, developers are still going to target 1080p because it means they can do more for less, or for dodgy development it means they can afford to optimize less and still acieve passable results.

Take the shift from PS3/360 to PS4/XBO, the new consoles are notably more powerful than their predecessors, yet the jump in resolution and framerate is a sporadic one, not all games are 1080p on PS4 and even less 1080p on Xbox One, 1080p60fps is even less common, the likelihood of skipping consistent 1080p60fps for a higher resolution is virtually zero, at best what youll see is developers targetting 1080p then occasionally supersampling from a slightly higher res to aid with AA.

Devs *CAN* choose to output higher than 1080P on PS4 because game level access takes control of the graphics pipeline allowing the engine to set the resolution itself, through this they can output higher resolutions if they desire, the only difference is that the firmware has no 4K option in the console setup, YET, so forcing >1080p through graphics api could work but when 95%+ of the players will end up with a black screen or signal out of range errors what would be the point?

15TFLOPS (AMD's current FLOPS) is only 8x PS4, that's less than PS3 to PS4 jump. And 720p to 1080p of 7th to 8th gen is lot less than 1080p to 4K.

So yeah, it is to low for native 4K, if any meaningful bump in visuals is to be achieved.

Woah, high end PC 4k visuals isn't a meaningful bump to visuals? Don't let the master race guys see that shit ;)