So Valve made an interesting announcement today.

To summarize:

• Steam is coming to the Mac platform, starting in April.
• Valve games, starting with Portal 2, will be simu-released on Windows, Mac, and 360
• Cross-play between Mac and PC is supported
• Purchasing for one platform can mean getting it for both (Steam Play).
• All existing Steam services will work for Mac
• Source Engine is also coming to Mac
• Source Engine code will cross-compile to either Windows or Mac, meaning less re-work in porting

Let that sink in for a minute.  This means a lot more than simply another way to buy Mac games, this is potentially the first step in a complete shift in the computer video game market.  About 60% of all AAA Mac games are published by one company: Aspyr.  That means that with a single business deal, Steam could be fronting a large portion of the entire Mac gaming catalog.  Steam is already easily the dominant digital distribution service for retail titles on PC, and could easily become the dominant force in Mac gaming too.  By making a bet on their future titles, they’re also saying that they see the Mac as a valid platform on it’s own, at least on par with Windows.

We’re moving to a world of digital distribution on the PC (Windows and Mac both).  The benefits to (transparent, non-obtrusive) DRM that becomes available on that channel make this a certainty.  To Valve, this isn’t just about opening a new market segment, this is about consolidating the retail channel under their house, and about continuing to provide further reasons why when you make a PC game, you should integrate with their user services and their social network.  If they’re successful, it means that they’ve abstracted away the OS.  The game will not be defined by what OS it runs on, but on what social network it’s tied to.  You won’t be a Windows Gamer, or a Mac Gamer, you’ll be a Steam gamer.