Cakewalk has published an interesting look at Windows 7 for audio production:
Q: In what ways has Windows 7 been optimized, in terms of performance, for audio production?
A: Windows 7 on the surface is very similar to Windows Vista. It has the same audio driver support and same audio system infrastructure as Vista. However it’s some of the under hood improvements that are more significant for audio production. There are some interesting innovations and optimizations in the Windows kernel, making the OS more scalable for concurrent processing. This makes it attractive for highly multithreaded applications like SONAR. Additionally there are various new API’s/SDK’s that may be of significance to developers.
The article goes into exquisitely geeky detail, so it’s worth a read if you’re running Windows.
See, too, Peter Kirn’s equally geektacular Window 7 OS-porn at CDM.