^ In terms of sheer variety, consoles have the PC beat hands down. There isn't even really a competition there. For my PS2 I have games like Katamari Damacy (which is absolutely brilliant, I suggest everyone with a PS2 buy it), Parappa the Rappa 2, Viewtiful Joe, Armored Core 3, SSX3 etc. - so that list includes a game in which you roll a sticky ball around and try to get stuff stuck to it, a rhythm game starring an animated dog, a super high-tech side-scrolling platformer, a mech-battle game, and a fast paced free-roam snow-boarding game. The games are completely idiosyncratic, and games like Katamari Damacy are just outright bizarre. There is unarguably a huge amount of variety there.
So in my PC collection, I have about a dozen FPS games that vary from each other only in terms of weapons and terrain, probably another dozen strategy games that also really only vary from each other in terms of weapons and terrain, about a dozen motorsports games that vary in vehicle and track selection, and a small collection of pretty traditional sports games. The Sims 2 is really the only non-archetypal game out of the bunch. Most of them make pretty big leaps in terms of graphical complexity, but in terms of gameplay they do virtually nothing. None of the games stray from inherent tendencies in their respective genres; none of them make anything more than miniscule steps towards challenging or evolving their respective genres.
However, if I were to try to explain a game such as Katamari Damacy, I wouldn't even know where to start. Classifying it in terms of genre is practically impossible - it is such an intensely original game that strictly defining it is nearly impossible. Another good example is Viewtiful Joe - at its core it's a traditional side-scrolling platformer; however, the amount of sheer creativity in it completely evolves the entire genre.
I agree with Haha604 that it is nice to have balance between console and PC gaming, but over the course of the last few years PC game developers have become so profit-driven that nearly all creativity and passion has been sucked out of the industry. All you get every month is a few dozen new games perpetuating forms and archetypes that haven't been new or exciting for 5-10 years. However, every month there are numerous console games released that may only get very limited releases and don't make much profit, but are developed by companies filled with a passion to create intensely fun and creative gaming experiences. There is nothing even remotely comparable that has come out for PC in quite some time.
Sorry for the rants in this thread, but this is sort of my area of expertise.
