Intel has quietly snuffed out its Project Tango smartphone as it rethinks augmented reality

Intel's RealSense 3D camera technology was the star of last year's Intel Developer Forum in San Francisco. Along with robots and drones that used RealSense to "see" the world around them, CEO Brian Krzanich showed the first prototype smartphone to incorporate the technology.The phone went on sale in January for US$399, along with a software kit that allowed developers to built augmented reality applications using RealSense and Google's Project Tango platform. It put Intel on the front edge