You have no idea what you are talking about. That one is just using semitransparent mirrors, whereas linked project has waveguide optics. One is a donkey, one

You have no idea what you are talking about. That one is just using semitransparent mirrors, whereas linked project has waveguide optics. One is a donkey, one is a Lambo in terms of technology. Which ones have you actually tried out of these said products; project northstar, hololens, above example?