Software should be released when it's ready, not to meet a deadline or schedule. (Hint to Microsoft: don't "rush" to Win7 just because of Vista's bad press.)
Some say until it becomes a game platform, Linux on the desktop won't take off. But at this point, I'd rather do gaming on a console. Seems cheaper than the [PC] videocard power needed these days to run the best games. Fortunately, I never turned on to Ubuntu, despite testing it over and over.