The ad is an interactive one page spread designed with LEDs which allow you to actually change the color of the Moto X on the page. You can only change the back plate color, not the front or highlights, but it is an impressive and simple way to convey a major feature of the phone in a print ad. Unfortunately, the special ad isn't going to be in all of the copies of the January 2014 Wired magazine. If you want to check out the ad, you're going to have to either find your way to New York and Chicago, or have someone grab you one from one of those cities.
source: The Verge