The Wii U is said to have 1GB RAM available for games (if not even less).  The PS4 is going to have 7 GB (of the 8) available for games.  My question is this.  How the heck does the Wii U have the techical capabilities to do games that the PS4 has, if the PS4 is going to have 7 times  more available RAM?  I can understand some current games we have now, in transition, and the likes of fighting games being doable, but what about stuff like open world games, where a lot of the RAM will be used?  How does the Wii U be able to keep up with this?

Call of Duty Modern Warfare 1 & 3, Black Ops, and World at War ran on the Wii despite the Wii having 88MB of RAM to the PS3/360's 512MB.

It can't. It's stuffed unfortunately.

So the PS3 and 360 wil also have no problem play next gen titles at all either, right?  So, then what is the extra RAM on the PS4 needed for if the Wii U is more than capable of doing everything you had mentioned?

However, assuming this review is valid, apparently MW3 didn't exactly hit the same levels that the 360 version did:

http://www.ign.com/articles/2011/11/15/call-of-duty-modern-warfare-3-wii-review

Well, curl-6 says it will be possible, because a number of Call of Duty titles made it over.

i don't think call of duty was a good example they got poor reviews on wii

We are not talking about quality of games but their portability to other systems with less power/resources.

you just have to ask if the engine scalable.
you are asking how the Wii U will handle PS4 graphics, and that is not possible. Nobody had said the opposite.

oh in that case call of duty is still a bad example

PS3 and 360 have less than half as much RAM as Wii U.

PS4 has more RAM because they wanted higher resolution textures, bigger, more detailed worlds, etc. However, a lot of PS4 games won't use it all, and for many the core gameplay will be able to be scaled down to fit into 1GB with graphical detail concessions, just as PS3/360 COD's core gameplay can fit into the Wii's smaller RAM with detail concessions.

I've played MW3 on Wii, its actually a remarkably close replication. IGN gave World at War on Wii a good review for being further from the PS3/360 versions, so they're not very consistent.