XKCD is a remarkable creative work, and today's art includes futurism, mild skepticism, and good humor.
I tread fearfully on Mr. Munroe's work, but I've taken the liberty of hacking the ending slightly with a homage to Zager and Evans' 2525. As you look at the image below (which may take a moment to load) you'll see a colored blue line at year 2102 which indicates where the XKCD original ends and the revision begins.
Meanwhile, On the Other Side of the Rotunda
4 hours ago