Cars at the moment have standard controls and you can get steering wheel n pedal set ups for your games console, but how long will it be till that is reversed?
Why do some cars have ashtrays but no lighter, just a 12V accessory plug socket and you have to pay extra for a lighter?
And why do tailgates on cars only open upwards these days? What happened to all the brilliant tailgate designs of the 60s and 70s? Clamshell, retracting roof sections, they've all been lost to the history books

And a final thought; if man were traveling at a fraction under the speed of sound, and knocked one out in the direction of travel, would his ejaculation break the sound barrier and create a sonic boom?