We are halfway into a third industrial revolution in which countless established industries have been threatened by a new generation of entrepreneurs who do not face the obstacle of distribution.

They face an obstacle course challenge, with the reward being phone calls home.

In layman's terms, this means allowing fish to swim up and down rivers without facing an obstacle.

However, you're facing obstacles in the form of those who regard the accompanying changes as a nuisance or, worse, simply refuse to budge.

Even when people do shop around, they can face obstacles.