One of the Sky Boys will almost certainly win - I'd be happier to see it be Froome, but that's not likely.
If we look at the field, no one's going to win by riding a hard tempo up the climb faster than Sky. No one has the team to hurt Sky that way. The only way anyone makes significant inroads is with accelerations at a lot of different points. Steadily hard plays into Sky's hands, so the race needs to be made erratically hard. Attacks on any climb with any kind of bite in it, and constant attempts to get guys from places 5-15 in the overall into breakaways. RSNT obviously has a lot of weapons here, but I'd also be sacrificing TJ for this purpose if I were BMC. Hell, Basso and Szymd should try to get into breakaways.
Most of these will come to naught, but they have to keep trying. Early and Often. You never know if EBH or Porte or Rogers will fold unexpectedly. And this constantly aggressive riding creates more opportunities for things to go wrong - both for Sky and the people doing the attacking to be sure.
In terms of actual acceleration on climbs, JVDB and Schleck may be the only guys who can do it. Neither Cadel or Nibali are explosive in the same way and at best could claw back a few seconds here or there at the end.
All of the above is a tremendous long shot. But the only real alternative is capitulation. I doubt Cadel cares about protecting a podium, and Nibali will not be on the podium unless he has at least a minute on Froome going into the last TT. So it's in their best interests to risk it. But I fear that all out warfare of the sort required now is something you only see in the Classics these days. And that's because some of those courses are so hard that they demand it. The art of teams making a grand tour truly hard in some way other than riding tempo seems gone, and we'll likely just see a few attacks combined with an overdeveloped sense of the effectiveness of fast descents.
May I be proven wrong.