From the page: "Technology, population, speed of travel, food and materials production, communications capabilities, computing power, the decrease in computer size, amount of information known to humanity, and a gamut of other things, are all increasing at an accelerating rate. That is, they are increasing, and the rate at which they are increasing is increasing.
Some mathematicians plotted the asymptotic graphs of all of humanity's technological developments and projected them out to the point where they all, relatively simultaneously, hit infinity. The day that they arrived at is December 21st, 2012. One projected date of "The Singularity." That's the day that some say is when everything as we know it will...change. Drastically.
Now I realize that this is a mathematical model, and that things never seem to happen on time, but as a good thumbnail reference point, it makes a convenient time to aim for. There are other models, other calculations, and other dates. The idea is more important than the specific date, IMO.
[An interesting aside: I've heard that the ancient Mayan calendar was calculated forward but ends on...you guessed it: Dec. 21st, 2012. I've also heard that the scientists aren't quite sure _why_ that is... :-) ]"