How far off is a heads-up display? That would change the game. EDIT http://www.microvision.com/vehicle_displays/head_up_displays.html http://www.microvision.co

How far off is a heads-up display? That would change the game. EDIT http://www.microvision.com/vehicle_displays/head_up_displays.html http://www.microvision.com/vehicle_displays/head_up_displays... http://en.wikipedia.org/wiki/Virtual_retinal_display http://en.wikipedia.org/wiki/Virtual_retinal_display These things are expensive, but electronics get cheap fast.