27. Virtual Reality
While some people may not realize it, virtual reality has been around for decades now. They used to be exclusive to arcades and nowhere near as advanced as they are today. However, VR is now possible to play in your home and it looks completely amazing and very real. Imagine what could happen when VR gets even more advanced than it is today. People may have random glasses with VR tech or contacts.

Heck, maybe even a signal could be sent to a possible chip that a person puts on their head and allows them to see the world in virtual reality. Yet this could cause a lot of problems. It could make people think they are seeing something they are not, causing them to do horrific things to others. The real zombie apocalypse in this happens to involve tech that a person does not know they are wearing, making them zombies to the world around them.