If you want incredibly shallow games that will keep you entertained for maybe a week, then go for it. The novelty is definitely there, but all novelties wear off sooner or later. I can’t tell you how many times I’ve heard this story: “I bought my kids a Wii. We all loved it for a week or two, but then it started getting repetitive and boring. Now it just collects dust.” Games can’t just be about novelty, there has to be real substance and depth. There has to be replay value. You have to want to come back to it a month later, 6 months later, a year later.
If Kinect is going to succeed, there has to be better and better games released for it continually. Even if the initial batch of Kinect games are great (which, for the most part, they aren’t), there has to be some guarantee that the games will get better. I’m not saying they won’t, but I’m certainly not optimistic.