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

[brendude13]

I see three different possibilities:

1. They can't.
2. Games will use 7gb and will have to be HEAVILY downgraded to work on the Wii U.
3. Games will use only around 3gb and will be moderately downgraded to work on the Wii U.