You've picked only games, there, which were designed with the PC audience in mind. With the exception of Skyrim, but that had already had a large PC following from it's previous games.
I love my PC, and I'm growing the hate the console market and their stupid format wars, but the sad truth is, almost all games designed with consoles in mind, even if they're just as good and perfectly suited to PC's as well, make only a small fraction of their sales on the PC platform.
For ever example you can give of a multiplatform game that did most of its business on PC, I can give you ten examples of a multiplatform games that sold a large majority of its sales on console.
But by all means, that doesn't mean the PC platform isn't great (I personally believe it's superior in terms of how it benefits the consumer) and I hope steam machines improve the value and popularity of the PC format.
And of course, it's worth noting that even thought average multiplatform game sells less on PC, the publisher also makes more from a PC sale as opposed to say, a Xbox sale or a Playstation sale, because you don't have to pay to license a game for the PC format like you do for a console games.







