Brands often face their competitors making advances or catching up to ones you've made. The longer you spend analyzing what they are doing the less time you have to develop what makes your brand special. You become homogeneous. You become replaceable and not memorable. As nice as it is to be new and improved with 8 million features, at some point we stop caring.
The same could be said for people, as depressing as that is. When you look around and see successful people and decide you want to be just like them, you've already lost. Develop yourself instead of watching others move past. Surround yourself with people who inspire you and bring out the best in yourself, no ones you want to ape.