Virtual Reality is one of this year's big would-be comeback stories, led largely but the runaway success of the Oculus Rift Kickstarter and Valve's recent rumblings on the matter. Not surprisingly, that talk is set to continue at South by Southwest Interactive this week, where Oculus Rift vice president of product Nate Mitchell will be moderating a panel discussing virtual reality as the "holy grail of gaming." The panelists? Valve co-founder Gabe Newell, id Software co-founder John Carmack, former Epic Games design director Cliff Bleszinski and Wing Commander creator Chris Roberts. We'
