Based on current TV technology there is no reason to exceed 64 gigabytes of RAM. Even a 3D 4K display could barely use that much memory.
There are two possibilities. IF current TV technology doesn't change fundamentally over this gen (and that's quite likely; TV tech is adopted much slower than console tech) then we're looking at either 16 or 32 GB of memory. 64 if 4K starts to take off (which is sadly unlikely.) Even PCs won't really be using that much memory.
Alternatively, prototype mind-reading devices, which can pull images directly from your mind DO exist. In ten years its entirely possible we'll be looking at VR consoles, which could easily need 256 GB of memory, if not more.







