Honestly, I think the reason HUDs haven't been more popular in cars is because they've been done "wrong" or because they've been mishandled (either in marketing or availability). The 240sx HUD was done wrong. If the 240SX had coupled a digital HUD display with an ANALOG speedometer, I'm willing to bet it would have been much more popular. But no one wants a digital speedo.GM offered HUDs with infrared overlays (an excellent idea!) in certain cars. But only in high-tier cars or grandpa cars (it was Cadillac and Buick that got them) and only with certain option packages. IIRC, actually getting the HUD in the Caddys that offered was made impractical by the way the options were packaged by GM.
If someone were to actually do it right (don't make it a gimmick, don't make a big deal of it) and just offer a head-up duplicate information display on the windshield in addition to the existing stock (UN-CHANGED) normal display, I think it'd be popular. As long as the manufacturer didn't lock it out of reach by packaging it poorly (something Nissan has gotten rather good at lately).
BBISHOPPCM wrote:Same with four-wheel steering (in the 1980s by Honda and Mazda, and again after the turn of the century by GM) and both times were not successful. Same can be said for a few other luxury items.
Nissan's HICAS 4 wheel steering system (used on everything from the GTR to the Q45) has been very successful and is still in use today.
HICAS delete kits are usually just for retard drifters who like to ruin the proper function of automobiles so that they can waste a lot of tires achieving nothing in particular. I do say "usually" though, because HICAS does alter the dynamics of the car (obviously) and a lot of people just don't like the different way cars behave with it. However, I'd say the fact that Nissan's most renowned sports coupe offered it is enough to bump it out of the gimmick category (into which Honda's mildly-useful-at-best parking-assist 4ws falls) and into the realm of real useful technology.