[mattlondon]

You could construct things that wouldn't fit inside the nosecone of a launch rocket if you assemble them in orbit.

You could also repair/refit things without them having to go through re-entry and then be launched a second time E.g. replace damaged/worn out rocket cones or solar panels etc if you can build them in-situ. Imagine Earth-Mars shuttles that just go back and forth that would need maintenance