Is it as simple as swapping in higher density chips? Won't memory bandwidth drop by half if they just did that?
I think they will need to have a wider memory bus, maybe higher clocked ram chips aswell, to get it up to the 176GB/s theoretical max. It could also require a redisigned memory controller, which means a new APU.
I could see them keeping a 500GB hard drive as long as its meaningfully cheaper than a 1TB one. Maybe 2 skus with both options.
PS, PS2, Gameboy Advance, PS3, PSP, PS4, Xbox One