For the dedication of its new Minneapolis building last week, the Prudential Insurance Co. got from 14 outstanding Midwest leaders forecasts for the future 20 years hence. All were bullish and some ebullient about the astonishing prospects for the U.S. in 1975. Some of the prophets:
¶ Chrysler Corp. President Lester Colbert: automobiles on superhighways may be driven by electronic "automatic pilots," with human guidance required only at exits and entrances.
¶ Northwestern Bell Telephone President A. F. Jacobson: people will be able to look at each other while phoningthrough combined television and telephone service.
¶ Northern...