If you think that Microsoft is the only one updating and optimizing their console than you are wrong. SCE Executive Vice President Masayasu Ito revealed a couple of interesting things on the strategies that Sony may have for the PS4 with regards to SKUs and improving performance.
In an interview with Japanese publication 4Gamer, Masayasu revealed that they are considering several ideas for the PS4 such as releasing a high performance PS4. This possibly indicates a new SKU with updated hardware specifications like memory, GPU and CPU. In my opinion this will most likely not happen as it makes more sense for Sony to launch the PS5 in the next 5 years or so. He further stated that PS4’s performance boost is under consideration but that may not happen anytime soon given the x86 architecture. I am not sure what he means here since X86 is pretty much the standard architecture…at least it’s better than the complicated CELL architecture Sony used in the PS3.
The PS4 doesn’t support Ultra HD Blu-ray and this may change in the future as Masayasu revealed that support is under consideration. I think these are highly ambitious ideas from Sony that may never come to fruition. I may be wrong though. Only time will tell whether these considerations will result into a new trend in the games industry: Enhanced Console SKUs.