Taking any big improvement from the leaked specs as out of bounds, what are the smaller things Sony can do to improve?
-mild improvement of GPU by going above 911 MHz, 4.3-4.5 teraflop range
-slight Jaguar boost, 2.2-2.3 GHz
-upping RAM clock speed a little
-freeing up another 512MB from the OS
-500 GB or 1 TB SSHD (+ OS optimization for flash and overall aimed at load times, also helping SSD users)
Anything else? (Aside from WiFi upgrade, SATA III, and a UHD drive taking those as stunning mistakes if not done lol)
Personally I expect none of these, although any (or ideally all) of them would be welcome without going to the extremes of a major APU redesign.