I hope Viswanathan Anand will be able to sleep this next year without having nightmares about his decision to sacrifice the exchange in this game. Anand had a very promising position and a genuine advantage after 23...b5, though he seemed to think it was only about equal. The subsequent exchange sac was an interesting idea in the abstract, but in the position it was simply too slow. Carlsen was better, and further inaccuracies by Anand sped the game along to defeat. After move 32 only reasonable accuracy was needed by Carlsen to prove the value of the material advantage, and Anand resigned shortly after the time control.
Carlsen thus wins the match by two points, 6.5-4.5, and will retain his title until at least 2016. Anand will again be seeded directly into the next Candidates' tournament, while the identity of the other seven participants is as yet unknown. (Fabiano Caruana is a very likely second name due both to his rating and his current lead in the Grand Prix series, but it's not a guarantee.)
Congratulations, Magnus Carlsen!