Microsoft took a beating at E3 - not only because of their now changed policy for disc-based games and the price, but also simply because PS4 seemed the more powerful machine.
Respected Examiner now claims that Microsoft is improving the GPU in order to better contend with Sony.
They also note that Microsoft may be looking at increasing the amount of RAM from 8GB to 12GB, but they are not quite as certain about that. Apparently Microsoft has been polling developers on what changes they may want as far as the hardware goes - and well, RAM is typically something developers always want more of.