If you didn’t think the performance benefits of using Aero Glass could get any better, then see this. At PDC 2008, Anantha Kancherla presented a session on “Windows 7: Writing Your Application to Shine on Modern Graphics Hardware” where he presented a mindblowing fact about the Windows 7 Desktop Window Manager.
Because Windows 7 can take better advantage of the GPU and uses the Direct3D 10.1 API, it is able to reduce reduce memory consumption (in the graphics system) by 50% per each window rendered. On top of that, this is also what enables the much richer animation and styling of the interface like the “color hot-track” feature. Pretty cool huh.