But would you get to choose your part in that reality. Like, say you choose the world of Harry Potter but get stuck as a muggle street sweeper rather than a teacher at Hogwarts.
But thinking along those lines, maybe you got the chance to press this button but forgot about it and didn't end up being a wizard, technically you might be living in the world of Harry Potter now
What if I was in Marvel universe, as one of the busy hero (or agent, spy, anything), found the button, and wished to live normally in normal world, and it already happened right now?
What if the movies I watched actually are remakes because I supposed be there but now I'm not exist in that universe anymore so they made the new versions?
What if the movies I watched actually are remakes because I supposed be there but now I'm not exist in that universe anymore so they made the new versions?