Outlook costs quite a bit (Mail is free)
Widgets (or the Windows Sidebar) has been around since 2003 when Microsoft had their PDC, however at that point, they looked very different than they do now, or compared to what the Dashboard of Microsoft's current widgets system looks like.
Remember, after the 2003 PDC, the sidebar was killed never to be seen again. That is until Tiger came out, at which point MS started talking about the sidebar again, and finally got it working in a build from 6 months ago.
Windows Calendar is an absolute rip off of iCal, and has been from the begining.
System Restore and Time Machine are a little different.
System Restore keeps snapshots of System Files and can put them back to the standard versions if things get screwed up.
Time Machine lets you selectively choose previous verisons of individual files, folders, or collections and bring them back.
Time Machine (at least with the information and demo provided) is not a "system-wide" tool other than the fact that it runs everywhere.
We will see in the next day or two after we (and by we, I mean devs) have time to load it on our own systems and start experimenting.