It's pretty easy to see why Oculus VR wanted to scoop up this company:Pebbles Interfaces specializes in technology that detects hand movement via "custom optics, sensor systems and algorithms," the Oculus blog explains. "Over time, technology breakthroughs in sensors will unlock new human interaction methods in VR and revolutionize the way people communicate in virtual worlds." We're talking about hands as controllers in virtual reality here. Pebbles joins the hardware engineering and computer vision teams at Oculus, where it hopes to make VR more immersive with improved human-computer interaction.