Another simple idea. I was watching the 1920s period drama Downton Abbey and Lady Mary was wearing a headband with a large jewel in it. I had an idea based on linking mist projection systems to headbands. I couldn’t find a pic of Lady Mary’s band on Google but many other designs would work just as well and the one from ASOS would be just as feasible. The idea is that a forehead band (I’m sure there is a proper fashion name for them) would have a central ‘jewel’ which is actually just an ornamental IT capsule containing a misting device and a projector as well as the obvious power supply, comms, processing, direction detectors etc. A 3D image would be projected onto water mist emitted from the reservoir in the device. A simple illustration might help:
Many fashion items make comebacks and a lot of 1920s things seem to be in fashion again now. This could be a nice electronic update to a very old fashion concept. With a bit more miniaturisation, smart bindis would also be feasible. It could be used with direction sensing to enable augmented reality use, or simply to display the same image regardless of gaze direction. Unlike visor based augmented reality, others would be able to see the same scene visualised for the wearer.