I think Fed will get to 2 more slam finals, maybe another Wimby and a USO. But to win, not sure. Can never count him out though. He even seemed to lack power today off the ground. But Stakovsky played the match of his life today. His serving won him the match and even if he can replicate that, some of his volleys defied belief for a player of his standard (no offence) and are such a low percentage play i doubt he could sustain it. If he was 20 and ranked this low i would say wow, new SV superstar maybe but i'm thinking more a rise to the occasion take chances flash in the pan.
The BBC website said he SV'ed 110 times in the match, the last time i saw anyone do that against decent opposition and actually win (before Brown-Hewitt just before) was probably LLodra over Berdych in 2010, Haas in 2009 over Cilic and Ancic 2008 over Verdasco. That's how rare it is, you might have a Mahut or Stepanek reach round 4 but they won't beat anyone of real note while doing it.