Tomorrow War is a movie about a war in the future where nearly no future tech is seen. Something many people wonder about. Where is the future tech? As a world builder, I think the explanation is simple. We originally heard from a world with 500k people and 11 months left before extinction. Their armies and such are destroyed. The movie than advances 12 months and tells us the horrific casualties inflicted on those sent into the future. And an emergency sends the main character’s wave of reinforcements there ahead of schedule into a fallen Miami Beach. Not falling. Fallen. The defenses have been destroyed, the defenders killed, and the people evacuated. We do not see an active defense of Miami Beach, with whatever the future still has to fight with. The scene is a fallen and evacuated city where nothing but aliens still live.