Nah, his points go like this:

- There is a pretty sizable Linux userbase compared to OS X. Not larger, but the same league.

- Any existing Windows PC can be installed with Linux, and many other non-desktop devices already run Linux, so the potential for growth in userbase given the right trigger (i.e. games) is much larger

- A significant portion of machines that run OS X have very low performance hardware. The Macbook is one of Apple's top-selling computers, and it has always lagged in graphics.

So, to wrap it up, both Linux and OS X currently have small share, but Linux has the potential for rapid marketshare growth on capable hardware, while OS X has neither.

Add to this the fact that only some fraction of those 30 million linux users are interested in gaming.

Same for OSX. Personally I'm a Windows refugee and I've been bouncing around Mint, *buntus, Deb n Arch to find my favourite and TBH I love what I see. Valve has done great work on their Linux Steam client.

I foresee a few blockbuster games being ported for Linux and Valve using some great marketing for it to win PC gamers over. Eventually it will become the preferred platform. Unlike OSX, Linux isn't hardware locked and CAN spread like wildfire.

The only way I see Linux gaming becoming "the thing" is if it cannibalizes Windows gaming. I think that even if all new games have first-class Linux editions, that will still be a difficult future to realize since you will still have legacy games that are Windows only (and wine will never become anything but a rounding error in that regard. Not in the next few years anyway, maybe 10+ years out playing games in Windows VMs on Linux will become reasonable...)

Look at the stuff Parallels has been doing with getting direct X running Virtualized in OS X. It's definitely possible to do. Heck, if it was possible to run OS X on custom hardware and have drivers that supported SLI, it would run respectably as well.