more PS4P details for the geeks
coles:
SATA 6Gbps at last for SSD swaps
512MB more memory for games
24% more memory bandwidth
double the GPU ROPs clocked slightly higher
existing PS4 games will only run with GPU half-enabled (unless patched)
9 of 13 'Pro-ready' games will use checkerboard upscaling (rendered 50% of 4K)
some will render dynamically between 80-90% of 4K (very interesting)
rare titles will render at FHD then upscale to 4K
less demanding titles like Last of Us Remastered will render fully in 4K
FHD displays will get some downsampling/geometry rendering
'2nd-gen' PSVR titles will get multi-resolution support
Inside PlayStation 4 Pro: How Sony made the first 4K games console • Eurogamer.net