What is the fine-grained topic of the following text: I think that the keys to making this technology successful include visibility in your line of sight as well as it (Glass and the Google servers) deducing what you are doing and thus likely to be interested in and displaying data about your surroundings or actions without you have to request it are what will popularize it. Only return the topic.
Factors influencing the success of a technology (like Google Glass) through visibility and deducing user behavior.