> The fact of the matter is, of the 250+ games I have in my steam library <50 of them work with mac. This ties me to windows.
And what has Valve done to promote gaming on OS X exactly? Sure, they had a short Portal promotion and have added games since, but they haven't exactly pushed the platform.
And besides, Macs are not good gaming machines. Desktop Macs (iMacs and Mac Pros) are much more difficult to upgrade than Linux/Windows desktops, and you get less powerful hardware for your money.
You can't install OS X on a non-Apple desktop (not without a lot of hassle, anyway), and very few people have done that. OTOH, you can easily install Linux on a Windows desktop, which is what most gamers have at the moment. A lot of the people on HN have spent a lot of time in the Bay Area and have forgotten that 90% of the population doesn't own a Mac, so let me remind you of that fact. Unlike with OS X, gamers can move to Linux without purchasing any new hardware.
Therefore, using the lack of success of OS X as a gaming platform since Steam added support for it to say that Linux won't succeed either is faulty logic.
> When I run windows 8, I can run steam and all my games, they dont magically stop working.
Well, there are many of us who already run Linux and only keep around a Windows install to play games. The vast majority of my time is spent playing Source-based games. If I were given the option of playing Source-based games in Linux, I would spend very little time in Windows.
> I'm very disappointed in valves wording, and it shows how poorly their responding to their first real competition.
I think they're responding the best they can. They're going up against Microsoft, which is well known for its anticompetitive behavior. The Windows 8 app store will be installed by default and given prime real estate (baked into the UI) in Windows 8. Valve needs to do something quickly before Microsoft starts abusing this power, and the best way to do that is to get gamers onto a platform no one controls - Linux.