There will be improvements on both consoles.
But there are two if not three important things as well:
1. Xbox One API already was 'closer to the metal' than DX 11 on PC. So it won't benefit as much as PC's.
2. Sony can improve their API, OS etc. as well. And they will. They've done that before.
3. Improvements depend on devs as well.
People should just stop expecting to much from DX12 on Xbox. There will be improvements though.







