I guess it was inevitable that some tech company would sell the naming rights to a popular product, and that the first company to do so would be Google, whose revenue comes almost entirely from advertising. Android 4.4, formerly known as Key Lime Pie, has now been renamed KitKat.
Nestle (which owns the brand) and Hershey (which licenses it in the US) must have paid a pretty penny for this. They have already launched a promotion giving away Nexus 7 tablets with game cards in in KitKat packages.
KitKat has also released a hilarious commercial
spoofing Apple's Jony Ives commercial, that ends with a shot of a Nexus 7 tablet, just in case you missed the point.