The document discusses the future of interaction between people and technology. It predicts that in the future, materials will be able to sense users and the environment cheaply. Computing power will continue to increase dramatically, allowing for real-time, interactive media streaming. Display and networking technologies will drop in price by orders of magnitude. This will result in physical environments that are modeled and controlled through virtual environments, with light, video, sound and sensors integrated throughout spaces and surfaces. Different generations will have different visions for how people and machines interact as technology platforms evolve over decades.