You also have to remember that the next gen consoles will be different from the current ones also on the OS level. I wouldn't be surprised if Sony's PS4 OS is similar to what they're doing on Vita where games can keep state, you can switch between them (albeit by suspending games to storage) and other things. That is something that you just can't do on the PS3. That kind of stuff should eat a gig or two.
At some point the next gen consoles will probably also run into a few walls for developer ambition and we start seeing sub-1080p upscaled stuff like we did with the sbu-720p games on the PS3 and Xbox. At that time the PC still can probably run those things with higher resolutions if the port is good.
At some point the next gen consoles will probably also run into a few walls for developer ambition and we start seeing sub-1080p upscaled stuff like we did with the sbu-720p games on the PS3 and Xbox. At that time the PC still can probably run those things with higher resolutions if the port is good.