Depends on what you mean. It is specifically designed to be a "living room" OS, like steam's big picture mode not a desktop system. So yeah not a traditional desktop experience.
Nothing in the release said steam only or no desktop, and they call out the ability to create content on the platform specifically Users can alter or replace any part of the software or hardware they want. Gamers are empowered to join in the creation of the games they love. Rather sounds like what they are doing is going to be open source and allow non games to run. Even if they don't ship with KDE or Gnome by default it should be possible to get something up and running.
Nothing in the release said steam only or no desktop, and they call out the ability to create content on the platform specifically Users can alter or replace any part of the software or hardware they want. Gamers are empowered to join in the creation of the games they love. Rather sounds like what they are doing is going to be open source and allow non games to run. Even if they don't ship with KDE or Gnome by default it should be possible to get something up and running.