Perhaps some people with automotive-engineering experience/background could speculate on why Heads Up display is not more common in cars. I've driven a couple chevy rentals, corvetteand camaro, with HUD and liked it. Clearly it can't be cost as the price would drop dramatically and the quality would improve with economies of scale. Is the general design thought that cars with HUD would be more of a distraction than looking down at the dash for a couple seconds? A good functional HUD could be interesting feature to further differentiate Tesla from competotors.