As a hardcore gamer, I spend a lot of time blasting motion control, casual games as well as Halo. Why though? Because I can. Obviously there's nothing that you can do to manipulate the powers of demand and supply (and the hungry money making developers), but I sure as well can express my opinion as often as I want.
That said, I think the last point is a little off the mark. FPS's are still going incredibly strong, mostly to do with the fact that it's a very adaptable and very immersive format.
