Andreessen argues that the U.S. now has two different economies — one, led by tech, where giant leaps in productivity have transformed work and driven costs down, and the other, concentrated in healthcare and education, where labor costs dominate and keep rising. Startups are beginning to tackle those industries today, and they could start transforming very quickly — or, Andreessen admits, “the other possibility is this is just pure hubris, and five years from now you’re going to play this back and you’ll be like, ‘Aha! Dot-com bubble 2.0.’ “