Technical Illusions is in this space and they seem to be going after a realistic goal. TI has a product that projects an image by reflecting off of material.

Technical Illusions is in this space and they seem to be going after a realistic goal. TI has a product that projects an image by reflecting off of material. They have working demos. Magic Leap seems to be creating AR by projecting a pixel onto your eye. That is a much harder problem that results in low field of visibility, low resolution, and short depth of field...at least from what I have been able to read.