I can see this working really well for younger users, non-power-users, and non-techies who want to carry around their desktop environment and whose needs are me

I can see this working really well for younger users, non-power-users, and non-techies who want to carry around their desktop environment and whose needs are met by web apps like Google Docs. I can also see its potential in developing countries where many people have a phone and a TV but not a PC. The medium-term goal is sort of obvious: Ubuntu running on the phone with the ability to display Unity on its own tiny screen or on larger external displays and allowing the user to interact with it via touch or via external input devices like keyboards, mice, etc.