Windows have its equivalent vfs thing. You can see My Computers Devices, Printers, Control Panel Applets, Windows Neighborhood, network shares and FTP sites and PocketPC filesystem in Explorer.
The main KDE 2 Desktop concepts (I mean Konqueror with kioslaves and kparts) was mostly embracing Win95/98 concepts, just doing them right, I mean, KDE devs did it because it could be cool and useful, not just because they were trying to steal Netscape's market share.
So, no, a number of features of KDE comes from Windows and KDE 4 is no exception, they just are there but most users don't notice about them.
Of course, KDE makes a better choice for me because their feature are usually better implemented, did at library level so the experience is more consistent, and of course there is the integration with the unix fundation.