Apple has posted what's likely its last TV ad of the year for the iPhone 4S (below). The 30-second promo shows Santa Claus using Siri's voice commands to help guide his sleigh run, including checking the directions to kids' houses and fetching the e-mail with the "naughty or nice" list. At one point, Santa is clearly stretching the limits of credibility for what Siri can do, checking on his meetings with every child in the world.
