It's shit, has DRM built in at the kernel level, the aero interface is retardedly bloated (my computer isn't even close to being able to run aero but I can emulate it smoothly on XP with 3rd party programs fine) and they're trying to drop GDI (the interface alot of common programs use to draw their windows to the screen)
The DRM thing is gonna be insane. MS is siding with MPAA and the RIAA, and if they have their way, we will have to buy every song and movie, once for each of our protable players, once for each of our computers, and once for the disc players in the house. By including HDCP (etc.) in the internals of the OS, Microsoft gives these corporations the power to choose when, where, and how we listen and watch WHAT WE ALREADY BOUGHT AND PAID FOR.
With all the "bling bling" turned off, it's basically XP :/