A couple of years ago it seemed like Djokovic would only win the occasional Grand Slam title, but he raised his game and became the best in the world. Murray seems to be following the same path; it appeared like he would always be a Grand Slam bridesmaid behind the Big Three, but his game looks to have no weaknesses now. In fact his style is a lot like Djokovic's now and hopefully it'll be a great finals match to watch.
Federer was a half-step slow against Murray the entire match, and he lacks the firepower of Murray, Djokovic, and Nadal when Rafa is healthy. His best chance now at a Slam title is on a slow court, but Nadal rules the French Open when he's not injured. I expect Federer to take over Murray's role as clear-cut fourth as Murray replaces Roger in the Big Three. Roger is still a great player and a joy to watch, but he's 31 and Murray, Djokovic and Nadal are all in their peak years.