I actually took a nap when the Aronian game was dead-drawn and they had just passed the 40-move increase of time, so I assumed that was that...then I woke up and the window was still up on my computer with the result, my eyes almost leapt out of my head.
I have to say that that was the best possible way I could've found out about it.
Everyone on chessgames is saying that he's not above Kasparov's peak live rating (yet), but as long as he's above 2851.6 or so at the end of the tournament, I think it's safe to say he will enter 2013 as the highest rated player ever on the FIDE list.
Carlsen said he would speak about this if or when he passed Kasparov, but I still don't expect anything other than a few bored mumbles about it being "a great accomplishment."
On the other hand, the chess media is no doubt going to descend on Kasparov as well, and that's where the real Freudian subtextual passive-aggressive gold will be. I anticipate it excitedly.