To what end? Life on this planet has about a 1 billion year run way left since the sun will start to expand and eventually strip away Earth's atmosphere and finally swallow the planet whole. It's taken 3.7 billion years to get to this point and most of the "interesting" evolution has occurred in only the last 500 million years. So it is true that the next 500 million should be even more diverse.
However unless another intelligent life form develops the point is moot. No matter how smart a dolphin, or raven, or chimp, or octopus is... if it can't escape this rock then it's not much different from a bacteria colony that dies out when it's food source is exhausted.
Evolution is random. For all we know an even more intelligent form of life will develop than us humans but on the other hand it's possible that for the next billion years we are the only fluke in the evolutionary timeline and nothing else will develop.
Finally there's a third option that is within the grasp of humanity which is to say we can branch off Earth's tree of life and take it into space while leaving Earth to develop as it will.