Yes, you can play some newer games on the Windows 8 tablets. The only issue you will have is short battery life. You should have a look at the new Razer Edge Pro that was just announced at CES. It looks to be a bad a$$ gaming tablet that will run full pc games.
http://www.razerzone.com/gaming-systems/razer-edge-pro
http://www.razerzone.com/gaming-systems/razer-edge-pro