Valve tested the Dota 2 experience on current-gen tablets and came away with a bad taste in its mouth, studio founder Gabe Newell told Kotaku. Today's tablets just weren't fast enough, apparently:

"We were working on getting Dota 2 running on some tablets," Newell said. "That ended up being kind of a disappointment. But the good news is that tablets are getting faster very quickly, so I think we'll get the kind of performance we want and other game developers want in the near future."

Dota 2 will come to PC and Mac at a future date that is sooner than originally planned, but still unannounced.