There are several advantages of a paved Earth over a non-paved Earth, the only really important one is the ease of driving though. Today roads are narrow, you have to turn, and most governments frown at ground travel over Mach1. With endless blacktop in every direction, there will be no restriction to your movement, and rocket powered hypercars will whiz in all directions. We will be able to amuse ourselves with endless driving at incredible speeds while drinking beer and eating wonderfully juicy burgers. Simply put, everything else sucks.
Concrete is clearly unsuitable because of the seams that are needed for shrinking and swelling.
As we are whizing around at tremendous speeds the seams in the concrete would create nasty sounds and unpleasant bumps. There are no other good driving surfaces. There are of course several other benefits of asphalt, which include the depletion of natural resources and increase of pollution in the atmosphere. The depletion of natural resources is of course a noble goal. When faced with the fact that the earth only has so many things which can be procured, it is of course an enormous challenge to squeeze that last drop of oil out of the ground.