They won't tell you, but they did hint at some improvements. I'm getting PRO so hope so. Sony obviously don't want to shout about it too much for fear of putting normal PS4 owners off PSVR (don't be it works great) BUT clearly they need to also realise that real VR fans don't mind spending a bit more again on a better system so long as we have real improvements.
Last I heard was the GPU in PRO has some VR boosts (similar to Nvidia Pascal) which could if true, and if used right, give us massive boosts in speed which can be used elsewhere on better graphics, AA, Supersampling and lighting etc.
I like Battlezone, had a blast online already though I find it quite complex so am taking it slow. If they could do supersampling, AA, and maybe increase the contrast a bit that would be awesome. I think the only thing that stands out to me is the washed out look sometimes, so perhaps a bit less ambient lighting and more punchy contrast (like the pre release vids) would have been nice to offset the HMD's own 'wash' (Mura).
Talking of which, on VIVE which I had they tried hard to correct MURA (but imo failed) what causes this? it's different from screen door effect (which is good on PSVR) but Mura you can see when in the tank in the dark, or on rush of blood on the dark levels, but I don't recall ever getting this on my rift DK2? It can't be to avoid black smear can it? never going true black cos I've seen true blacks (and black smear ) on other PSVR things so not sure what gives, but I'd love them, or devs if they could to reduce the MURA effect (the grainy linen overlay on dark scenes). Unless it's part of the hardware. Still as said I don't recall DK2 having it so...