I think helping with the economic development of smaller areas would be a huge benefit in and of itself. But basic income opens up really revolutionary ideas beyond this. Imagine you get 10,000 people together and the income is set to something quite low - $1000 a month. That's $10 million a month that, if a moderate sized group of people were willing to coordinate and work together, could be used to build new cities and developments from the ground up.
In a way a basic income can almost be seen as a decentralization of government as it enables citizens to direct government funded spending at their discretion.