Good question. Since the Earth is 4567 million years old, a million years is NOT a lot of time!!!! The Earth will change because it has always changed just like a person growing up is always changing . . . but for the most part these changes are incremental and not catastrophic.

Not much, that I can think of anyway. We'll probably have gone through at least one and possibly more than one ice ages in that time, but nothing particularly spectacular will happen to the earth itself just because a million years have passed.