Most of the people who bought the Wii are very knowledgeable about their console. They also enjoyed it and bought a lot of games.
Nothing wrong with expanding on the Wii brand. As was said by VO, however, they should have called it Wii 2. People love sequels, and associate higher numbers with something better. This would have been the same idea as Apple's iPhone 1, 2, 3.. and so on. People would love to buy the new, better version of Wii called Wii 2.
Regardless, the biggest problems with Wii U are a lack of must-have software, poor marketing, and strong value in the PS360. A lot of people were still buying PS360 and they still have great games coming out, and are cheaper.
Wii U needs a new marketing campaign that promotes it as a high-tech innovative new product and some great new games. The fall lineup should help, as should the killing off of PS360 with the arrival of the more expensive successors.
You really think that the majoity of Wii purchases were made by knowledgable gamers? I'm not saying that there aren't some, but if Wii didn't appeal to the casuals, party folks and people who saw Wii Sports and Wii Fit as games of choice...I see Wii selling a lot less than PS3 and 360 today. They'd lose half of the Wii sales easily without the blue ocean...