I'll nominate Martin Schubert. He's a VR designer at Leap Motion. He's been tweeting out interaction design experiments for hand-based input within VR. Some really awesome stuff. We both spoke at a VR design conference recently and it was so interesting how much on a different level the designers at Leap Motion are thinking. Designing for hand-input is certainly a big bet, and it may not pay off, but it's fascinating and inspiring to me! https://twitter.com/MrSchubert