If open source is the future, and hardware can be made dirt cheap anywhere on the planet, how is anyone going to make any money? Service?
Yes. Lots of work available for people to build & provide customized solutions to problems, especially if they can build those solutions without getting worried about being sued every time they slap some code together.
Not when there are 7 billion people on the planet. There'll be plenty more work than people available.
That means you can build potentially 7 billion customizations for any given tool - there would be plenty of work available, as long as people trying to prevent competition through legislation don't get in the way.