New shape for mac interface for your Windows 7 even before Mac IOS has it :).
MaC ZerO Windows 7 Visual Style has aero version of Mac interface with awesome transparency.
you may need to use a tool form this article Install 3rd Party Windows Themes By Using Universal Theme Patcher, VistaGlazz and UxStyle.
The Visual Style compatible with both x86 & x64 and has new Startorb.