Stephen A. Schwarzman, CEO and co-founder of The Blackstone Group, one of the world’s premier private equity firms, remembers the exact moment when he realized that private equity, which had occupied a sleepy corner of the capital markets for more than a decade, was changing. “I’m doing my sit-ups and watching CNBC. Suddenly somebody starts talking about me on television ….The business has gone into a weird zone of visibility. For those of us who have done it for a long time, it’s strange,” said Schwarzman in a keynote address at the recent Wharton Private Equity and Venture Capital Conference, whose theme was “Exploring New Frontiers .” Schwarzman and two other keynote speakers — David A. Brandon, chairman and CEO of Domino’s Pizza, and Timothy Draper, the Silicon Valley venture capitalist — examined the recent explosion in private equity deals and discussed its impact on business and investors. Schwarzman, who started Blackstone with Peter G.…