The more I use/test Windows 7, the more I get confident that this release will get Microsoft back on track. Windows Vista introduced a lot of new and interesting stuff, but was not that polished as one could expect. Service Pack 1 of Vista did take it up one notch, but not far enough.
As the statistics nerd I am I like to know exactly what my laptop is doing, how much memory is used, which program accesses disk etc. Vista have a quite good Resource Monitor application and of course the Task Manager (even though I use Process Explorer quite a bit). Windows 7 contains some really good updates to these built-in applications.