Ratings are just an expression of how strongly a player has been playing over a fairly long period of time; they don´t mean that every game, every move is at the same level. A 2800 player on a good day is capable of seeing and calculating a 3000+ combination; likewise, he´ll also make the occasional <2000 blunder. And yesterday was a very good day for Anand ...
I don´t think it was a question of what Aronian did not see when he first moved his Knight away from f3, but rather what Anand DID see. Carlsen wouldn´t have described the game as "mindblowing" if that hadn´t been the case. You don´t get brilliant games without at least one crucial mistake, however small, which sets off the fireworks; yesterday Aronian made that mistake, maybe on Saturday he´ll brilliantly demolish Karjakin in under 20 moves ... that´s chess, and I don´t think that a single game provides any reason to cast doubt on the value of the rating system.
Ive read many threads about ratings, who is the best player and all that and many have argued about the ratings but i just saw an Aronian at 2802 beaten by a lower rated Anand in a fashion that one would ask why an 2800 did not see. Your opinions please thanks.