>Under current and historical conditions, but what happens when the bourgeoisie have complete power over people via technology?
This is a common intuition, but look at it level headed: technological complexity makes it harder to control because there is a longer chain of parts that all have to link up, more people have to play along. A Corporate overlord has less power over people than a medieval duke in his fort. The futurelessness that is weighing you down is not their power, it's the dysfunction of the system. If they were capable to have as much control as you think, the systems would work much better. Ruling over a desperate slum is much harder than a shining city on the hill.
>They don't need us any more,
They don't produce any value, the workers produce the value. I want to know why their propaganda effort to make them self appear indispensable worked on you, why do you think you need them ?
>They can just kill us and take whatever we have. It's fascism.
Might makes right is the mark of incompetence, fascism is a way of loosing with maximum damage. Look at the state of the world, who is winning ? Is it the people that are murdering and pillaging or is it the people building and creating ?