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A man reacts while trying on an Oculus VR Inc. virtual reality headset at the Topgame Technology Corp. booth at the Global Gaming Expo (G2E) inside the Venetian Macau resort and casino, operated by Sands China Ltd., a unit of Las Vegas Sands Corp., in Macau, China, on Tuesday, May 19, 2015. The gaming expo runs through May 21. Photographer: Billy H.C. Kwok/Bloomberg via Getty Images

A man reacts while trying on an Oculus VR Inc. virtual reality headset at the Topgame Technology Corp. booth at the Global Gaming Expo (G2E) inside the Venetian Macau resort and casino, operated by Sands China Ltd., a unit of Las Vegas Sands Corp., in Macau, China, on Tuesday, May 19, 2015. The gaming expo runs through May 21. Photographer: Billy H.C. Kwok/Bloomberg via Getty Images