(via Reddit) According to Polygon.com, J.J. Abrams is in talks with Gabe Newell about making movies about Portal and/or Half Life. This conversation took place during a Keynote talk about storytelling across platforms at the 2013 DICE summit, which before today is a thing I didn't know existed. That talk took place today, and isn't up online yet. I'm looking forward to seeing it.
My first thought when I read that Portal might be a movie was "No way." I'm a little embarrassed that I had that reactionary response, because it's not fair -- the response under it, the thing that makes sense to me, is "How the hell would you make a movie out of Portal? It's such a game." The medium of the game, specifically the game, Portal, not just the medium of 'games,' tells the story of Portal better than any other way I can imagine, because the story was written specifically to fit the game, not the other way around.
Obviously, there's a huge difference between "I don't know how this could be done" and "This shouldn't be done." I think it definitely should, if J.J. Abrams is on board and Valve is fully involved. These are people with a real interest, investment and history in demanding more of their chosen media, and a Portal movie might be an avenue into new revelations for both games and film.
Or, I mean, they could make the Half Life movie instead.