"Of all the thousands of forms of recreation in the city, these were the most popular. When you entered a saga, you were not merely a passive observer...You were an active participant and possessed—or seemed to possess—free will. The events and scenes which were the raw material of your adventures might have been prepared beforehand by forgotten artists, but there was enough flexibility to allow for wide variation. You could go into these phantom worlds with your friends, seeking the excitement that did not exist in Diaspar—and as long as the dream lasted there was no way in which it could be distinguished from reality."
Clarke's description accurately depicts the reality of modern video game technology.
Arthur C. Clarke. The City & the Stars, (1956). London: Gollancz. 2001.