Mad Max Fury Road. They defeat the tyrant, and get the control of the water valves. Then they open the valves and seemingly keep them open. One problem, how long is the water reservoir gonna last now?
Logan’s Run. The city dwellers are freed from the computer’s iron-fisted rule, and Carrousel. But their city is in ruins, and thinks to the computer providing everything. They don’t know how to live without it. The city dwellers are going to start dying off real fast.
No, if anything the way you can tell you are in a dream is because the top spins forever and never starts wobbling; the way he got his wife to eventually concede that she was in a dream was by setting the top in a perpetual spin so that she stumbled upon it still spinning.
The significance of the ending is not that he is still in a dream but that he is so content with the situation that he stops caring whether he is in a dream or not. (Actually, in fairness that is not quite true either; I’ve heard that basically the ending is more Nolan trolling the audience than anything of narrative significance.)