How far has the men's game progressed since Connors and Borg?

This excellent article in the New York Times tells of the current male players and how they have More Power, More Speed and Unmatched Depth than in era's gone by. Federer says "Talent is not enough anymore,” I’m talking about talent, let’s say, in your hands. Like about touch and feel and spin. I’m not saying that it used to be. But it used to bring you a long way before and not anymore,Combine that power with the speed and athleticism on the tour, and Federer said it was no longer enough for professionals to win with technical precision, or superior strokes.Here is a link to the full article.