Heaven doesn't need to be static... in fact I think it's likely the opposite.
Remember CS Lewis's metaphors at the end of the Narnia books? Life was the prologue of a great book, now in Heaven the true story can begin, with each and every chapter better than the first. The children, now killed in battle, exploring "true Narnia", much larger and more real, and worlds within worlds even larger on the inside than the outside, and other worlds to explore, old friends to meet again and new friends to make, enough to learn and do and explore for infinity, and it all being so good that boredom is impossible.
That's always how I've envisioned the ideal afterlife—the infinite ability to explore and interact on a level totally unfathomable to the current life, and unlimited access to it.
(Now, I'm not sure if I actually believe in an afterlife, but that doesn't mean I can't think about it.)