It doesn’t surprise me that Gabe Newell would want PC and Console to play with one another:
It’s a dream that Valve honcho Gabe Newell seems to share. A member of the PCMasterrace subreddit by the name of Eternifity sent the Gaben an email asking him to “open the gates for cross-play gaming.” The benefits of doing so, he said, would include increased community sizes, fewer platform-exclusive games, and increased freedom of choice when purchasing a gaming system. “Opening up multi-platform multiplayer gaming is the next step to a better gaming community,” he wrote.
This has been evident since Portal 2 where PC, Mac and PS3 users could play together. Still, it would be interesting to see how well that would play out.