The mag would cost, what, $100?

I'd rather buy 2 to 3 games for that.

I think you had made a great point but i think they would go with the cheap blu/red 3d ... so they can just put a paper glass into the magazine

Printed 3d doesn't cost THAT much. They make the effect by using plastic and creating ridges within it that displace each image to the left and right. It wouldn't be the whole magazine, probably just a page or two. Considering 3d greeting cards are commercially available and not that expensive, it seems like this would be a cheap and easy thing to do.

Cool idea, but won't work. The 3D paper thing's totally different. It'd take a LOT of meticulous work to properly recreate screenshots on paper, in 3D.