In raw numbers of games released in a year the PC dominates but it generally has far fewer "exclusive" high quality games than a console. This is mainly because anyone can publish a game for the PC if you have enough money whereas Sony/Nintendo/Microsoft have standards when it comes to who publishes games for their platforms.
Back to the original point of the thread ... I think that if Sony produced a Wiimote like device for the PS2 they'd be making a massive mistake. It would be unable to sell particularly well because of how few people would buy it as an add on, and it would validate the approach that Nintendo has taken.







