Biggest change: "There's a far greater proliferation of options for entrepreneurs today than there ever was in the past. The number of entrepreneurial opportunities has clearly grown."

What's next: "I think electricity will be one of the most important industries in the second half of the century. It's going to take a major private-sector investment, and we'll start seeing even more opportunities in areas that didn't exist before."

-- Bob Galvin, 85, Galvin Electricity Initiative