Half-Life 2 (PC): 4M
Halo 3 (360): 8M
Grand Theft Auto San Andreas (PS2/Xbox): 20M
Call Of Duty 4 (PS3/360): 10M
Super Mario Bros (NES): 40M
Gran Turismo 3 (PS2): 15M
World of Warcraft (PC): 10M subscribers
The Sims (PC): 100M copies sold by April 2008
Solitare, Minesweeper, or FreeCell: I don't know, but it's gotta be huge . . .
What I meant is when they are sufficiently different in design as to not be viable on a console.
-Look at how different strategy games play on the console vs the PC. In order to make them playable on the console, they have to invent a whole new system of control in order to make the concept work at all without a mouse.
-A flight simulator style game also would be difficult to port to the console due to the extremely complex controls. Granted, that style of game is largely dying even on the PC, but it's one of the few styles of games that it is doubtful will ever be seen on a console other than in a very arcade style.
-MMORPGs are still largely PC territory.
-Basically, consoles are best suited for games with simple controls. For more complex games, the PC will be the best choice for years to some. Anything with a complex control system will
need to be simplified to play on the console. Keep in mind the average keyboard has well over 100 buttons - and some games use them.
-The PC is constantly evolving, while consoles are static. You can already build a PC that will outperform the Xbox 360 no matter what way you measure it. In fact, you can build one that outperforms it and is quieter as well if you pay careful attention to your cooling system. So if you're the kind of person who counts triangles, takes a close look at the resolution of textures, and counts the number of shaders being used, then you'll want a PC.
-If you want to mod a game, PC is the only choice. Consoles are generally harshly locked down, preventing games from being modded.
Of course that does
lead to some shallow games built just to show off the graphics (Crysis). However, there are still some good innovators in the market. Take a look at Portal or the upcoming Spore. There are also a lot of great games made by smaller companies such as Audiosurf and Sins of a Solar Empire. With procedural generation getting a lot of attention, I expect to see a lot more large games created by small developers in the near future.
And if you want to talk about rehashes of old games - the console is every bit as guilty as the PC. Mario? Halo? Metroid? Sonic? Soul Caliber? Final Fantasy! Every console is pretty much guaranteed many of its games, especially its "core" games, are going to get a new release when a new console comes out.
Rehashing games is part of the business, frankly. Doesn't matter if its console or PC, there's a big demand for keeping old franchises. I'd say all platforms are guilty as charged.