Enhanced and interactive television - already a reality for a tiny segment of the U.S. population - will permeate homes by the millions in the next two years and will have as big an impact on the industry as television had upon radio, a senior Microsoft Corp. executive predicts. Paul Mitchell, Microsoft Corp.'s Senior Group Manager of Interactive TV, made the remarks at a panel discussion last Thursday, December 16 sponsored by Microsoft and The Hollywood Reporter at the Mayan Nightclub in Los Angeles.