Andre has posted his 20 page, 100+ screenshot preview of Microsoft Windows 7 Release Candidate Build 7100. Here is an excerpt:
In Windows 7 itself, the Compatibility process is handled through a number of avenues, which include the Windows Upgrade Advisor and Application Compatibility Toolkit (ACT) to help customers assess application compatibility. For untested or in-house developed applications, Windows 7 provides a number of in-box compatibility aids. For example, if an application fails to install because of a hard-coded version check, the Program Compatibility Trouble-shooter can automatically fix the problem (with the users consent) and rerun the installer. Windows 7 includes an expanded application shim infrastructure and Problem Steps Recorder that people can use to capture compatibility issues for evaluation by technical experts.