People attend the NY TechDay fair in New York, the United States, April 24, 2014. NY TechDay is a massive science fair for startups which attracts tech enthusiasts and over 400 exhibitors to show off their companies to thousands of consumers and investors. (Xinhua/Wang Lei)

People attend the NY TechDay fair in New York, the United States, April 24, 2014. NY TechDay is a massive science fair for startups which attracts tech enthusiasts and over 400 exhibitors to show off their companies to thousands of consumers and investors. (Xinhua/Wang Lei)

People attend the NY TechDay fair in New York, the United States, April 24, 2014. NY TechDay is a massive science fair for startups which attracts tech enthusiasts and over 400 exhibitors to show off their companies to thousands of consumers and investors. (Xinhua/Wang Lei)

People attend the NY TechDay fair in New York, the United States, April 24, 2014. NY TechDay is a massive science fair for startups which attracts tech enthusiasts and over 400 exhibitors to show off their companies to thousands of consumers and investors. (Xinhua/Wang Lei)