Interesting assumption.
I think that we can look to shooter fatigue as a better point of emphasis. After a lengthy stay at the top of software genre sales breakdowns, shooters have been bested in sales by Action titles over the last two months. Skyrim and Just Dance sales are staying the course for the most part, while MW3 and BF3 are headed down.
We've seen a big focus on shooters for a good part of this console generation, but trends change. That's not to say that the genre doesn't spike back when the next big FPS comes out, but I think that the era of the shooter is nearing its conclusion.