According to a blog by Mike Swanson, a technical
Microsoft has made only a few bits of information about Windows 7 available to the public. In May, it said it would not be using a new kernel, but rather will refine the Vista kernel in the new operating system that is due out in 2010.
In August, a Microsoft group product manager said that Windows 7 is equal to Windows Server 2008 R2, which means there will not be major changes. The client version of Windows 7, however, is expected to be a major release.