They are trying to start a discussion about realistic, upcoming as well as fantastic dreams for the future of space. This is a good way to go about it I think, until we know what it is we really dream about we can know how to choose from what is possible or how to push beyond the just possible.
One of the questions was along the lines of, if you had one thing to say to the designers of future space flight systems what would it be? Here's what I said:
Keep your mind open, think beyond government centralized control, think beyond scientific goals. Think of the internet, the blogosphere etc, how that exploded in a short time once people were enabled with technology. How could we enable small governments, corporations even groups of committed individuals to harness technology for use in space or even to explore space? Computer power is available, the knowledge is available. Committed groups of people exploring for their own goal may be willing to take risks and reap rewards that government programs never could. As space scientists and engineers how can you enable this kind of revolution?