Valve confirmed today that AMD, Intel, Nvidia, Oculus and Unity will speak at the company's upcoming Steam Developer Days, which will be held in Seattle, Wash. from Jan 15-16, 2014.
Steam Developer Days is a two-day conference for all developers and publishers working with Steam and/or the upcoming Steam Machines. According to the event's description, attendees will have the opportunity to share industry expertise, take part in roundtable discussions and test-drive and provide feedback on Steam OS, prototype Steam Machines and Steam Controllers.
Registration for the event is now open and is offered on a first-come-first-served basis. The registration fee is $95. A list of event speakers and presentations can be found here.