Resource Monitor provides more details[Click image to see full-size]
This diagnostic tool was introduced in Vista and gets a major overhaul in Windows 7. On the CPU tab, for instance, you can drill down into details about exactly which Registry keys and modules are being used by a running process, including system services. The graphs on the right let you spot performance issues at a glance.
This gallery is a companion piece for my in-depth review of Windows 7 based on the final release candidate. Be sure to read "What to expect from Windows 7" to get the full story.