Looking forward to putting a gaming PC in your entertainment center? Keep waiting: Valve says it doesn't expect to officially launch its Steam Machine until 2015. The delay was announced in a rather casual blog post, and the update is loosely worded -- it's a "release window," not a promise. The quality of the controller seems to be the main thing holding back the release: Valve says its getting a substantial amount of feedback. "It means we'll be able to make the controller a lot better," the company writes. "Of course, it's also keeping us pretty busy."