"It can become a family affair. There is that fun competitive aspect to it," Bryant said. "It does just give us another option. I think for some kids it could be their primary option. I like the idea for giving people a menu of choices. ... The big mantra for folks should be learn how to move more."
Dr. Goutham Rao, clinical director of the Weight Management and Wellness Center at the Children's Hospital of Pittsburgh, agrees with that mantra, but says that games like Wii Fit encourage people to compartmentalize working out, instead of incorporating it naturally in their day.
"One of my bigger concerns is that it teaches that physical activity is not a part of your everyday routine," Rao said. "I can't see children sustaining this for very long. At best it will be a novelty for a few hours or a few days, even."
The Wii Fit also might not offer as much social interaction that both children and adults crave during fitness activities, according to Rao.
"There's a whole bunch of other things people get by going to gym — a greater variety of exercise. There's a social aspect. It's all going to be missing here," he said.
The Wii Fit will go the way of the dusty exercise equipment that no one uses, Rao predicts.
"We'll see Wii Fits on sale on Craigslist by the summer," he said.