hmm.... thats not exactly what I had in mind.... But its the same result though. As I understood it they used regular LED:s to project the image onto the screen.

If we were to use laser, I think the contrast would be improved alot! (Laser and moving mirrors to project simple ascii code) Perhaps using a darker tone on the windshield would additionally improve contrast.
Allthough I guess building a system based on laser and mirrors would be pretty complex and expensive. But it would be VERY cool to have it display current song in glowing "laser red" i the bottom om the windshield....

I know this is possible.... Have seen it done..... I think they even use lasers like this to highlight heat objects in front of the car... Saw a project who had installed a IR/heat sensor to find heat sources.... and then highlighting them on the windshield to the driver... Allthough... this is not availeble to buy yet... But the idea is REALLY cool!....=)