Right now the solutions for walking through large virtual reality environments are quite limited. You're typically looking at either a 360-degree treadmill or playing in a gigantic physical space. Google, however, might have a better solution -- although we're not sure if we'd call it elegant. The company has applied for a patent on VR shoes (really, roller skates) that would let you walk anywhere in VR without bumping into a very real wall. The technology would track your feet and use motorized wheels on the footwear to bring you back to a "return zone" whenever you venture beyond a safe area. You'd avoid embarrassing collisions -- though you'd also look like a massive dork, if Google's less-than-flattering illustrations are any indication.