5G is widespread in China and being tested in America and Europe. Potentially, it will unleash a tidal wave of smart devices. Doctors will carry out surgery remotely, taking advantage of 5G’s speed to control precision robots. Designers and lawyers will work remotely through shared virtual realities. Scientific experiments will be carried out over long distances, allowing scientists across nations to take part in common research projects. 5G will transform ‘smart cities’, with sensors for gathering, analysing and processing data on public transport and energy consumption. They will improve waste collection, detecting whether bins are full and telling bin-men where those full bins are. 5G will keep traffic flowing by working traffic lights based on traffic volume. Self-driving cars will communicate instantly and avoid crashes. Rural areas will benefit from autonomous drones hovering over plants and spraying sticky ones with pesticides when needed. The most surprising innovations are those that still live in our imaginations.