How will the Wii U fit games on the PS4, if the PS4 will have 7GB RAM available?

[richardhutnik]

siavm said:
Seeing the games we have now this will not be a problem for years. Most games won't even use all the ram ps4 has for the first couple of years. And Nintendo is the one who makes their games shine on their systems. So things are not as dark as all these doom threads keep making them out to be.

I am figuring that, the first few years, you still have gaames in the pipeline which can also work on the 360/PS3 and next gen consoles, that should be able to fit on the Wii U once they start maxing out the memory.  If they don't design a game to scale down RAM usage, but maximize it, then are people still say EVERY single videogame made in the future, is going to be able to be scaled down?  And here I am not talking about stuff like Black Ops: Declassified, which is its own spin off, but the same game.