Just a bit of clarification:
The ability to render in 2K / 4K is not the same as a "Remaster". The engine has not been altered, the textures have not been altered, the 3D models have not been altered. The only thing that is different is the number of pixels that are crammed into each frame. The
Aspect Ratio is the only thing that changes. (This is not the same type of thing as, for example, the difference between Skyrim and Skyrim SE.)
What makes 2K / 4K resolutions so exciting for the future is that on-screen details are naturally so fine that it removes the need for post process effects (like anti-aliasing, mip-mapping, shadow filters, etc.) -- which can be
vicious in terms of gobbling up performance and creating FPS drops. The downside is that running at 2K / 4K resolutions requires hardware that can actually
do it (in raw triangles / pixels per second). Games will likely struggle a bit for a generation or two until hardware manufacturers switch things over to this new technique (getting rid of architectures in GPUs and drivers that cater to the older "post-processing" methods.)
Heat:
As for the strain some people are hearing from their fans, TW3's engine has always been very demanding. I play on PC, but my fans will spin up and
stay spun-up while I play like no other game I own. This isn't necessarily a problem, as long as
temperatures do not climb that high. (It's just the fans doing what they were designed to do!
) I'm not sure if it's possible to monitor actual component temperatures on PS4 / Xbox, but a good way to check is to hold your hand around the box near the vents. If you can comfortably hold your hand there, even if the air is "hot", that shouldn't be a problem. If it actually
hurts to hold your hand there, like the case or metal parts burn you a little, it IS probably running too hot, and it would be a good idea to take steps. Sometimes, moving the box to a more open space so that it has more air to breath is all it takes. If not, there are all sorts of (inexpensive and efficient!) external cooling options that should let you play without worries.
As technology transitions into this new way of making games look and run awesomely, we'll simply need to do the "Techno-Facacta Waltz" with our PCs or consoles.