Virtual reality is so much more than visuals, but most of what we're used to seeing is little more than head-tracking and 3D imagery in a head-mounted display. For real immersion, VR is going to need to take advantage of the other senses as well. Touch and smell are just as important as sight and sound, but those are much harder problems to solve. Thankfully, a company by the name of Dexta Robotics is developing a peripheral to simulate the sensation of touch in a virtual world.