Depends on the traveller
Although I can understand what is being said about travelling at a slower pace and without mobile phones, sat navs and laptops.
I think it completely depends on how you travel in the first place. If you are the type that must plan, record and tick off sites it will always be a point to point, next, next type journey. If your biggest problem in whether to turn left or right at a intersection then you will see all you want too. Some people like to do it and get the t-shirt others like take their time and see what there is to see. I am a bit of both at different times during a ride.
Slowing down would certainly help with this but only if you are open to what you are slowly passing by.