I think that most exisitng complicated, inconsistent, or non-unified physical laws will eventually reduce into a very simple set of unified laws that will explain the fundamental forces and types of matter and energy. Eventually there will be a Grand Unified Theory.

However, even very simple laws can yield unimaginable complexity given enough time and energy. So I think we will have an ultimate kind of fundamental physics. But as you move outward from physics to all the disciplines of science and knowledge that build on physics or are consequences of our physical world (chemistry, biochemistry, biology, botany, horticulture, agriculture, psychology, theology, etc.) there will never be an end of discovery.

Physics is about reduction and simplification, and it has an endpoint. But other disciplines are about complexity, and there is no end to complexity.