I had an interesting conversation at a recent snow trade show with a guy who has started a company to produce helmets with gps, camera, video, radio communication, WiFi, etc all built in and controlled by a powerful mini computer.
His original idea was to service first response emergency workers so they could instantly communicate a scene to their controllers and co-workers. They have decided to target the adventure sports market now as well, starting with the snow sports.
Of course, the first question I wanted and answer to was, "what is the type and brand of GPS chip in the helmet?". It is some Russian chip and it was the one thing he didn't know the technical details of. He is getting back to me on that. I told him all it needed was a HUD and he was nearly there!

The downside is that he anticipated a price of over $800, and they were still working on the waterproofing level.
forcitehelmets.com/For some reason unknown to me I cannot embed the home page video.
But this video should work:
Interesting article here:
www.smh.com.au/technology/australian-smart-ski-helmet-attracts-global-interest-20150302-13snly.html