Valve head—and one-time Microsoft employee—Gabe Newell has branded Windows 8 "a catastrophe for everyone in the PC space" at videogame conference Casual Connect in Seattle. The Valve boss continued, saying that in the fallout from Windows 8, "we'll lose some of the top-tier PC/OEMs, who will exit the market. I think margins will be destroyed for a bunch of people." Newell criticised Windows 8 while talking about the future of the gaming industry, and you can read everything he said at VentureBeat.