Wii Fit definitely appeals to a larger group of people, and when there's obese people out in the U.S., I guess it makes sense.
I will admit though, I did buy Wii Fit. I bought it so that I wouldn't have to deal with having to go to the fitness center and boringly work out for an hour or two, but I knew that Wii Fit would be nowhere close to actually working out.
One thing about Wii Fit though, before actually playing it, I also thought it was just a waste of time and it wouldn't do anything, but actually, if you really get into doing the exercises properly and do it for a long period of time, it actually can become a workout. Wii Fit though mainly helps with flexibility and balance though. Obviously working out on Wii Fit probably wouldn't do as much as if you were to jump on a treadmill or a bike, but you will probably see some improvements. Previously before I bought Wii Fit, I had to do a sit-and-reach test in gym class after a continuous run for 12 minutes, and I was able to get 34 cm, which is really good for the average male's flexibility. After about 2 weeks of using Wii Fit atleast 2-3 times a week, I had to do the sit-and-reach test again but this time I did it cold and didn't do any runs and I got to 36. A 2 cm increase without stretching is actually a lot, so yeah, Wii Fit comes nowhere close to hardcore exercising but if you just want something to help monitor your weight and just getting a decent exercise, then you should try it out, but using Wii Fit to like lose 60 pounds in a few weeks, don't know about that..