Great ideas! Hopefully Google is crawling this great idea and reporting it back to Big BrotherI'm mostly interested in the HUD aspect. What kind of info does it display and how easy is it to see?
I've said for a while, as a motorbike rider, that the next big innovation will be HUD for speedometer, gear position info etc.
This would be very interesting for cyclists too, would be great to see a map with directions on your favourite pair of Oakleys. And to be able to switch between that and a rear view shot to see what is coming up from behind (more cyclists this, than motorbike of course).