One guest who attended the E3 PC Gaming Conference was Xbox head Phil Spencer, who reiterated Microsoft's commitment to PC gaming during the PC-focused event. Obviously he was there to talk about Windows 10, DirectX 12, and the crossover with Xbox Live. He didn't have a huge amount of announcements to make, but the Xbox chief did confirm that Killer Instinct is heading to PC. We'll update you with more news as we have it.