HUDs are not a recent option on cars. A 1993 Pontiac Bonneville SSEi has a HUD that shows speed, turn signals, low fuel, etc. Most HUDs only show very specific information as they use Vacuum Flourescent Displays (VFDs) to show the information. I'm not aware of anyone utilizing a pixel-based display for a HUD. Cadillac and BMW have a video-based HUD for their night vision systems.
If you're looking for one to experiment with, the wrecking yards/auto recyclers are the place to search. GM has them in the Pontiac Bonneville and Grand Prix, the Chevy Corvette and Buick Park Avenue. Nissan had a speed-only HUD in the 240SX.