Space travel
New Technologies
new materials can be made or produced
a better perpulsion system
better understanding of our universe
better rocket designs
Applications
There will be more experiments in space, thus more discoveries
our better understanding of spcae will help in the effort of giant space stations or colonization.
it could save the human race if there were a catistrophic event
Cost
the actual trip to space needs to be cheaper
if common enough, they should commericalize
Maintanence will need to be cheap