ablac said:
This does sound stupid but no I dont because a pub/dev would never admit to a game being supported by sales on one platform. However I do think that, considering the sheer cost of games to make today, the PC alone could not support a large number of AAA and even some AA games. Whether you yourself specifically play those titles is ancillary as many PC gamers do. Therefore without the purchases on Console a PC title wouldnt be made because the game wouldnt exist or at least not nearly as much cash would be thrown at it. This is not to say the PC does not support games on its own, as it does with titles such as Tribes, im simply saying games we enjoy wouldnt be around, at least as good as they are and numerous as they are.
http://www.worldometers.info/computers/
This says that there are over 1 billion PC's in use in 2008 and that will have grown quite a bit since then.
Steam has 4 million active users nearly all the time and over 40 million active user accounts, which shows that PCs could support those games seeing as there are many gamers not on steam.
Sheer cost, let's take that myth apart.
1# Developers set their own budgets, if you don't have the cash then cut some things, don't do such shiny graphics, people won't mind.
2# Going on PC only would be cheaper as you only have 1 platform to develop for.
3# Things like crowd funding, kickstarter etc happen on PC which enable projects like FTL to take place which couldn't happen on consoles.
You say most of the cash comes from consoles, if you actually did some looking you will find that much more money is spent by PC gamers, profit margins are much higher on PC gamers support developers more than on consoles.
Let's look at a few games
Minecraft: 5.3 million sales and counting
http://www.pcgamer.com/2011/07/20/cthulhu-saves-the-world-pc-sales-smash-xbox-live/
"Cthulhu Saves The World PC sales smash Xbox Live"
Cthulhu Saves the World and the superbly named Breath of Death VII have made more in less than a week on Steam than they did in more than a year on Xbox Live,
http://www.overclock.net/a/blizzard-held-a-press-conference-e3-55-gross-profit-margin-of-wow
Blizzard say you make 60% profit on digital and 20% profit on discs, that shows that PC gaming is more profitable than consoles as consoles are disc dominated and PC is mostly digital.
http://www.extremetech.com/gaming/97705-pc-gaming-vs-consoles-the-infographic
This article shows how PC overtook consoles on revenue in 2010 and most likely ignores steam which doesn't reveal sales figures.