I think that sometimes getting new technology is a need but most of the times it is a want. For example when you break your phone and you need to get a new one to stay in contact with people but people who just get a new phone whenever the new model comes out is a want and not a need. People rarely think about the carbon footprint of a new phone they just think of the size, camera, and color. So it really depends on your situation to determine if it is a want or need.