Brand confusion has long been an issue for the Wii U. Thanks to the confusing name and the similarities between the look of Nintendo's newest console and their last one, some have mistaken the Wii U for a Wii accessory. This certainly can't help.
As spotted by Twitterer @Shane1323, Target's most recent ad for the Wii U uses a picture of a Wii U GamePad resting on top of a Wii. Oops. At least they got the name right — although, if they really want to appeal to people, they should call it "the new Wii".