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| No, just not technology exposed. A heads-up display projects information onto a glass window in fromt of your eyes. So if you were using a light bar, the dots or arrows would be projected ont the windshield of what ever you were operating. A "good" system would actually let you move the position of the "virtual" light bar around based upon how you sat in the seat, how tall your head was, etc. It is a virtual display because you can see right through the image. Used on Caddy's 20+ years ago. Widely used on jet fighters where looking at instruments on a dash takes you eyes off of the sky. A multipurpose system can display anything you want - speed, direction, field map, fuel guages, warning messages, etc. The imaging engine is just a projector of some kind. The difficult part is the screen or the windshield. Has to be transparent but also display the image. If you can affort a $10,000 toilet seat, you can probably afford a special canopy for your fighter jet. Earlier version had a separate "special" glass panel that sat in front of the windshield. Now, get someting that can work under all conditions (day, night, direct sun, zero degrees F, etc.) and let anyone in the cab see the information.
For additional information, see: http://en.wikipedia.org/wiki/Heads_up_display
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Heads-Up Display
