i tried the kinect. the latency was god awful and completely ruined the experience. i'm sure there's some R&D spent on improving the latency, especially when it's running on a battery powered device vs plugged in kinect. and i don't think Apple just bought Primesense and slapped FaceID on the tech and called it done. i'm guessing they needed to improve the tech a bit more to make it secure and not prone to spoofing. --- Post Merged, Nov 7, 2017 --- what? why per phone? i'm asking how much did it cost to develop the hardware design/software for FaceID. it wasn't a rhetorical question.