All these "Xbox One Secret Sauce" things are non-sense. esram isn't a saving grace, the "power of the cloud" hasn't proven it can amount to anything more than dedicated servers for multiplayer (yes it can do background physics, like any dedicated server) which haven't yielded particularly fantastic results yet and likely won't, and Direct X 12 is no different than improved APIs for either GPU.
My main issue with people thinking Direct X 12 is something to improve performance is the general history of Direct X. While each iteration offers new, unique ways to improve visual quality, I have never seen a release of it actually improve performance which is kind of important. What good is enhanced visual quality if a constant 30 fps cannot be held with it?
With the PS4 there are no gimmicks tied to it, simply a strong GPU. The refined code for both will make it easier for programmers to create worlds and optimize performance, and sure once programmers get better at optimizing the ESRAM in the One, performance should improve. Much like them figuring out how to use the GDDR5 in the PS4 for optimal results.
I'm more curious to see what programmers can do with Mantle and other low level optimizations with the GPU. Direct X improvements should make programming a little easier though.







