Cars now go 100,000 miles between tune-ups. They used to go, what? 10,000 miles?
Cars are much safer in collisions than they used to be.
Most cars now have air conditioners. I've driven in a car without AC in Arizona in July; believe me, AC can be a really big deal.
Most cars now have automatic transmissions, power steering, and power brakes.
And cars get much better fuel economy.
Driving from NYC to LA takes less time due to interstates and higher road speeds (and cars that can comfortably handle those speeds). Not half the time, but still a significant improvement.
And yet, most cars are not dramatically different as far as the experience of driving them is concerned. Nothing in the last 50 years looks revolutionary. It's been an accumulation of improvements, but there has been no game changer.
I suspect that the next 50 years in computing will be similar.