Ok, obviously unethical to do it, but this sounds like you've got the power to create some sci-fi shared dreaming device, where you can read people's brainwaves and send signals to other people's masks based on those signals. Or send signals to everyone at the same time and suddenly people all across the world experience some change in their dream simultaneously.

Like, don't actually do it, but I feel like there's inspiration for a sci-fi novel or short story there.