You don't have to be a Linux programmer (though I bet it helps) to believe in Open Source software. I wouldn't have thought something like Ubuntu was possible until I experienced it. The more people switch over, the better it will become, and the less we'll have to rely on expensive and proprietary computers.
Ubuntu needs to continue to support new users and make the OS accessible and user-friendly. This is clearly happening already, but, please Ubuntuites, don't ever give up.