That was some performance by Federer. Serve and forehand clicking, and the backhand held its own. That was complimented by a really good performance at the net. Not much anyone can do when all of that comes together.
Ironically, I wasn't a fan of the continuous chip and charge (I really think this tactic is dead in today's game). I understand the logic: Roger doesn't aim to win every point when he does that. But it's a long haul thing: When he chips and charges on a few points, even if he loses them (and he did, for the most part), it puts the idea in his opponent's head, who now expects it, and maybe feels like he needs to do something extra on the second serve or look for Roger to come in behind the slice. That said, I still think guys like Nadal, Murray and Novak are too good on the pass, especially if you're just floating a ball back in play and rushing the net. The return needs to be really deep and low for that to work. Even when Roger was winning points after a chip and charge, it had more to do with some unbelievable reflexes at the net rather than a good approach.
On his own serve though, his decisions to attack the net were generally spot on, as was the execution. As a matter of fact, the shot selection on the whole was quite spectacular. Great performance.