So first off, in order to make a game you need game developers, and Valve has about as many of them as GameStop now. So they can't make a game. If they were staffing up to make one, we would have probably heard about it, unless it's 8-bit and Gabe can make it on his own. So my speculation is that some autistic programmer who works on the Steam backend did some experimenting on his own and showed the results to Gabe, and they're announcing a game for which they plan to hire the staff sometime AFTER the announcement. So don't expect anything playable soon, unless, as aforesaid, it's at 8-bit or Portal levels of complexity, in which case why bother.
Moreover, even at its height, Valve still couldn't make a great game: I quit the original Half-Life from boredom 4-5 hours in. It was a solid game for the time, on the level of Doom, but beyond the cool intro it was just a dungeon-runner. I have extensively reviewed both games in Not Art essays, and given both 4/5. I have not played Half-Life 2, and that's probably much better than the first, from what I have seen, though I doubt it is a masterpiece simply because Valve isn't good enough to create one. And if it wasn't good enough decades ago, it sure as heck isn't now.
TL;DR: I only care about the tech, if it exists, in which case I am sure CIG will incorporate it pronto into Star Citizen. That's all I care about, and the rest is just tired midwit memes.
