It has gone mostly unnoticed. However, 2012 marked a point during which, we were swiftly integrated into an Earth like simulation. Despite some strange changes in the simulation, such as blue lava in Indonesia, and an underwater waterfall in Mauritius, the change have mostly gone unnoticed by mankind. All in all, the simulation is pretty similar.
While many people feel that 2012 is the last year that the world will be in existence because of the Mayan calendar, it is pretty obvious by now that the world is not ending this year. The end of life as we know it can not be predicted. Humans are constantly trying to predict when the world will end and no group of people have been successful yet.
The year 2012 is not really the end of the world because the end of the world idea is probably a hoax made by people who are not rational. Although there were more natural disasters this year, there is no evidence or signs that any serious event will happen by the end of this year.
There is no empirical evidence to suggest that 2012 is the end of the world. Indeed, 2012 could be the beginning of the end for human dominance of planet Earth, but the same could be true for any year. People should not get all worked up about the end of the world, instead they should live each day as if it were their last, and try to get the most out of life. Besides, if the end of the world is near, there isn't one thing that anyone can do about it. It is a pointless question.
It seems that every generation thinks that they're on the cusp of the end of the world, and it's no different with the entry of the year 2000 to have people thinking that nothing can go on beyond them; but relatively speaking, all of us who currently exist are but a drop in the bucket (even less) on the timeline of the world.