If you're happy with your fitbit, then you're probably making the right decision for yourself.As much as I want an Apple Watch I think I will wait until generation 2. Battery life is going to be an issue and I would not be surprised if next year's version is thinner. Right now I am happy with a fitbit and my iPhone but once the Apple Watch gets more health features like an oxygen sensor I will buy one. It is going to need time to mature like the first iPhone better off waiting if you can. This all may change once I try it in store though.
On the other hand, I never once regretted buying or having the first iPhone.