Can you play 4k games on PRO? Yes, Can you play 4k Games on a 750ti? yes...….PRO enhanced titles were made to look better on 4K TV's, but they never said it was a 4K native machine, just that it can play 4k content, which happens to include 4k native games, CB, DR etc......But they never marketed it as a game's console which plays every game at 4k native....
OK here is this quote from Cerny, the Chief Architect of PRO.….He said it's not a 4k native machine, you would need much higher specs for that...
Cerny said
"Incidentally, he mentioned that his personal estimate is that rendering at native 4K across the board would require a minimum of 8 teraFLOPS of computing power, and thats not something that can be achieved at a reasonable price this year. That said, users will be able to discern the difference between games on PS4 and the improved versions on PS4 pro at a glance."
Then Sony said this;
"PS4 Pro: Dynamic 4K Gaming & 4K Entertainment"
https://support.playstation.com/s/article/PS4-Pro-Dynamic-4K-gaming-4K-entertainment?language=en_US
The above clearly says it's not a 4k native machine, over and over again....They were always on about CB, the ID buffer, Geometry rendering, wavefronts and tonne of other techniques that's not native......Now take that messaging and compare it to.....this below..
By Phil Spencer.....
“I look at [PS4] Pro as more of a competitor to [Xbox One] S than I do to Xbox One X,” claims Spencer. “This is a true 4K console. If you just look at the specs of what this box is, it's in a different league than any other console that's out there.” Spencer points out 40 percent more GPU speed, more RAM, and the speed of storage as the advantages of the Xbox One X over the PS4 Pro, but he also knocks Sony’s methods for getting to 4K resolutions with some of its games. “When I think about techniques to somehow manufacture a 4K screen like what some other consoles try to do, this is different than that.” Spencer also says he expects the majority of consoles that Microsoft sells next year will be Xbox One S."
https://www.theverge.com/2017/6/13/15790162/microsoft-phil-spencer-xbox-one-x-vs-ps4-pro-interview
It's a different message entirely...……..Can we agree?