This Yahoo patent from a few years before seems very similar to this concept: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=H...

Do notice the Apple logo on the side of one of the sketches:

http://www.seobythesea.com/wp-images/yahoo-virtual-reality-g...

And the talk of virtual reality games (without actually building them):

A virtual World Of Warcraft-type overlay can be generated that is superimposed on the real world by wearable device instead of being viewed on a computer screen. According to the virtual overlay, user can be enabled to play in the real world, but be fighting virtual characters.

From: http://www.seobythesea.com/2010/04/yahoo-exploring-virtual-r...