Even if they used GNOME or let me dump the sidebar, it’s still a great Linux distro. If I had some better hardware I would still want Ubuntu, even if I added a Windows partition for playing games.
That said, I have Win7 installed in a BootCamp partition on my Mac and it kicks a$$ running directly on the hardware. And zero compatibility issues with offbeat hardware due to virtualization. If I was a gamer I'd use the on-the-metal Windows install more I guess.
As it is, I spend 90% of my time in Linux at work, and 90% on a Mac at home; the rest in Windows when required. It'll be a fine day when games run as well on Linux as they do on Windows.