Do you think games will ever take advantage of this on OSX to start giving Apple an edge? Right now I still have to have a Windows machine if I want to do any gaming.
Will OSX ever catch up to Windows for games? Maybe. Some game companies take the approach of writing everything in OpenGL to make it easier to port between systems, writing a layer of native code to support their cross-platform code.
However, some studios use DirectX which is windows-only. The popularity of OSX and iOS will only increase the pressure on game developers (and engine developers) to write code that is easier to port.