And if you look at the gradual addition of features to Instagram that Krieger describes you will find that they all answer these type of questions: will this prompt the user to take or share more pictures, will it make the process easier or faster, will it be more fun and fulfilling for the user and their friends?
For example, Gorman reports, if a user wants to send an email to a contact, Assistant will prompt him to find out if the user wants to send a message to a personal or work email address.
The upgrade features a new Metro user interface - designed for touch gesture controls - which Mr Dell said should prompt users to change their computer.