The radio would be computerized, but you'd need to install 64 M of RAM, a
new sound card, a game card, a new video driver, a CD drive, and type
C:\radio\talk\drlaura*.* to get it to play.
The entire engine wouldn't be in the bay at once, and the car would have
to keep stopping and starting to load in the relevant parts.
The speedometer would read 70 even though you are only doing 50.
You would have to have a full service every 500 miles.
Your car would refuse to start, with a message "Abort, Retry, Fail?"
For some reason the engine controller would need a 1G hard disk and would
take 5 minutes to boot up.
The steering wheel would be replaced with a mouse and you'd need to
memorize the keyboard shortcut for "Brake."
A particular model year of car wouldn't be available until after that
year--instead of before it.
They wouldn't build their own engines but form a cartel with their engine
supplier. The latest engine would have 16 cylinders, multipoint fuel
injection and 4 turbos, but it would be a side-valve design so you could use
Model T Ford parts on it. There would be an "Engium Pro" with bigger turbos,
but it would be slower on most existing roads.
The air bag system would say, "Are you sure?" before going off.
New seats would require everyone to have the same butt size.
We would all have to switch to Microsoft Gas.
The U.S. government would be forced to rebuild all of the roads for
Microsoft cars; they will drive on the old roads, but they run very slowly.
The oil, alternator, gas and engine warning lights would be replaced by a
single 'General Car Fault' warning light.
Sun MotorSystems would make a car that was solar-powered, twice as
reliable and 5 times as fast, but it would run on only 5% of the roads.
You would be constantly pressured to upgrade your car.
You could have only one person in the car at a time, unless you bought a
Car95 or CarNT--but then you would have to buy 10 more seats and a new
engine.
Occasionally, your car would die for NO apparent reason and you would have
to restart it. Strangely, you would just accept this as normal.
Occasionally, executing a maneuver would cause your car to stop and fail
to restart, and you'd have to reinstall the engine. For some strange reason,
you'd just accept this, too.
Every time the lines of the road were repainted, you would have to buy a
new car.
People would get excited about the new features of the latest Microsoft
cars, forgetting that these same features had been available from other car
makers for years.