While it's definitely a good thing, here's hoping Steam for Mac will actually be a financial success, since as excited as some people on here may get, even the potential growth from a product such as Steam coming out pales in comparison to the size of the PC gaming market, and so hopefully games can sell well enough (and we're not talking thousands or even tens of thousands of copies sold, but hundreds of thousands at least) to justify continued development on OS X.
As a side-note, as others have pointed out, games that have natively been developed for both Windows and OS X typically have the Windows version outperforming the OS X version by a decent bit. Here's hoping Valve can actually improve upon this situation, because otherwise Windows will remain the premiere gaming OS (as it probably will anyway, but hopefully the situation improves).
As a side-note, as others have pointed out, games that have natively been developed for both Windows and OS X typically have the Windows version outperforming the OS X version by a decent bit. Here's hoping Valve can actually improve upon this situation, because otherwise Windows will remain the premiere gaming OS (as it probably will anyway, but hopefully the situation improves).