Seeing quantum computers work will be like seeing mathemagics at work, doing it all behind the scenes. Physically (for the small ones) it looks the same, but abstractly it can perform all kinds of deep mathematics.
Which hour ? If they create real quantum computer they can start identifying person that creates reality for all of us, assuming reality is broadcasted by collective mind, I doubt they can do it right now and I am sure the moment they start that person will log out from internet. Good bye then.