While Microsoft has not made any grand promises, that doesn't mean that gaming performance won't improve. Refinements to the operating system, and/or to Direct X 10, could result in a notable performance increase, yet at the same time slip under the radar. At the very least, it seems that Microsoft has an interest in making Windows 7 smoother and easier to use. This focus, if it results in a quicker, lighter operating system, could result in a performance boost for gamers.
To find out, The Firing Squad , a PC hardware and gaming website, did a serious of benchmarks pitting Windows 7 against Windows Vista. The results? While The Firing Squad seem impressed, I think the results can be interpreted as a definitive "meh". Across the series of tests, Windows 7's performance ranged from a little bit better to a fair bit worse. The instances in which Windows 7 seriously stumbles, such as Crysis benchmarks, do not worry me. There is a strong and reasonable argument to be made concerning driver immaturity. This is a beta, after all. That said, if we are to expect any serious improvement in gaming performance, I believe we would have an indication of it at this stage. The latest rumors say that the release of Windows 7 isn't that far away.