I honestly do not see anyone beating Alberto next year. The guy seems to be back in form + 100. If he is able to concentrate on the Giro and win it without burning too many candles, I see him taking the TdF too. Regardless of the shape Quintana, Nibali or Froome show up in.
His attack on Ancares sent a bigger message than many realized: End of the last grand tour of the year which he didn't want to take part in, coming out of a nasty knee injury, with his biggest rival getting back to form as the Vuelta progressed, the rest of the main contenders playing dumb and letting Chris get back into the swing of things even though they had a chance to get rid of him 15 times over, Alberto takes off like a rocket after the last of Froome's crazy accelerations.
This is what the others will be taking home with them.
I can't wait to see Porte's duck face as he is put in serious pain trying to drag his leader up another mountain pass.