i personally like my ps3 and 360 better, and i will tell you why?, to me for 399-299 in my ps3 i have a great gaming system, a bluray player for my home theatre, web browser, i have a wireless ksyboard and mouse, wifi, and great graphics and gameplay, ya pc may have a edge in graphics, but 17 inch screen vs 47 inch, i like the 47inch LG LCD LED, great tv, we have just now scratched the serfice on what they can do with the ps3, graphics are great. i dont want to spend tuns more money on mods to keep up with the pc, thats just me, for what i get with my ps3 a 47 inch hd tv and 7.1 dolby digital sound and comfort of the couch , it does not get any better then that.

tl;dr: poster knows nothing about pc gaming

There are over 300 million PC gamers.

PC is way better of course, and it will always ....
On the other hand, it is bad for your wallet...

I didn't know this data, but it looks on the optimistic side to me, I just applied the conservative ~10% estimate to the ~1billion Win XP users to get a reasonable MINIMUM number of PC gamers. Then Vista gamers and the remaining 2k and 98/ME ones must be added too, but for the declining platforms I haven't found reliable data, neither for Vista, but I guess that at least another 40million can be safely added to the MINIMUM number. Then, it must be considered that there are a part of XP gamers with old PC's, that mainly do retrogaming, but anyway, in the end, we can say that even if and when consoles do their best, PC user base is now so big to stay in the same order of magnitude.

Wait, I realize now that what may make the real number approach your estimate are Chinese online gamers, whose a very big share uses pirated Windows, but pay for online gaming, so their number of regular gamers can't be calculated from regular OS users. And this not taking into account other countries OS pirates (but it remains unclear how many OS pirates buy regular games licenses, besides when it's necessary, for online gaming on official servers).

The fella here reckons around 100-150 million high-end gamers and another 100-200 million more casual gamers. The PC games market is enormous, diverse and very healthy.

I agree on everything except "healthy"... -> Piracy...

@Mudface:
I quite agree, I wrote minimum estimate only because it was the most reliably calculable, and to avoid providing rabid PC haters any possible excuse to dispute  

Edit @Sardauk:

Obviously I used minimum estimate, much smaller than shio's optimistic one, also predicting your reasonable objection.   

And even so, it still accounts for around 30% of game revenue. Looks pretty healthy to me.

Retail is the past.

Piracy has always existed, and exists on consoles just as well. Hell, piracy is easiest on Wii/DS/PSP, and the Wii and DS (the former requires only an SD card and an external HDD, and the latter requires an investment comparable to that of a brand new game) still manage to be software beasts.