In Linux we call things like these Desktop Environments. This one doesn't look too bad considering it is a front end for Windows. It looks very similar to the GNOME 3.x DE.
When I first saw it, considering it is in VB (all work I have seen in VB is somewhat laggy all over the interweb) I fell in love with it because it was slick, fast, and just nice looking. I only don't like the part in which it is like a tablet or phone, with the appstore and what not.