I'm really surprised that people think consoles are currently a niche market for games, after an example like Call of Duty selling 8.4 million copies in the US in a month, with almost all of the copies on consoles, not PC. And if ever there was a PC-friendly genre, it's the first-person shooter.
http://www.gamasutra.com/view/news/31995/Exclusive_Black_Ops...