I didn't say "no different" - the point is that there are
evolutionary changes and
revolutionary changes.
Compared to a 1970s car, your 2010 car would have been significantly more fuel efficient, more reliable and less prone to corrosion - but it would still be a ~4-person vehicle, powered by a diesel or gasoline internal combustion engine, your choice of manual or automatic mechanical gearbox and pneumatic rubber tyres. It won't be twice as fast, it won't drive 500 miles on a gallon of fuel and it certainly won't fly. More importantly, your visitor from 1970 will be able to hop in and drive it immediately with no more difficulty than switching between two different makes of car in 1970.
You might need one of these, though:
Arsvita Car Audio Bluetooth Wireless Cassette Receiver, Tape Player Bluetooth 5.0 Cassette Aux Adapter, Black
www.amazon.co.uk
(and maybe a bottle of additive to let you run on unleaded fuel)
That's evolutionary change. A 2010 car does exactly what a 1970 car did, just somewhat more reliably and efficiently. There are are still people driving around in 1970s or earlier cars and they don't say "sorry, I can't drive to the Apple Store because my car is from 1970".
Now, compared to 2010, in 2021 there's a fair chance that your new car might be electric or hybrid and/or have some rudimentary self-driving ability -
then we may be talking about a
revolutionary change... although it is still only doing the same job as a car did in 1970, still can't fly or, frankly,
safely drive itself.
If you want to compare a late-70s personal computer to a car, it is more like a 1908 Model T Ford - especially in that, if a 1970, 2010 or 2021 driver got in to one, they wouldn't have a clue how to work it. Still changed the world though...
By about 2000, your typical personal computer was doing things that would have been implausible science fiction in the late 70s. 20 years later - it's still doing the same things, just a bit better.