Steam on Linux

With Steam officialy coming Linux soon, I might just completely uninstall Windows. If I can natively play Counter-Strike, Team-Fortress 2 or something the The Elder Scrolls on Ubuntu without WINE or any other sort of program like that, then why do I need windows? I already have everything I need on linux, the only other game I'd like to see ported over to linux is League of Legends, but it's not a must. I don't know, what do you guys think? What will you do once Steam is on Linux?