Well, He's not really looking at the Big Picture. Halo is what? played by almost all FPS gamers all over the world? Even Counter Strike is played by many in some countries who never even played Halo. Here in the Philippines for Example, never had an official Halo Tournament, its just not popular. Thats why almost FPS Tournaments are PC-Based.
I've Tried Halo, its good but doesnt really amazed me. and besides, its real awkward for me to play FPS not holding on to a Keyboard and a Mouse.
That to say, at least, that PC-FPS gaming is sure to stay and will be good for the majority depending on their Influences. Saying "hardly anyone plays FPS on PC" is a big overstatement, its like saying, in 5 years, FPS will all be console based.