The big thing is that it dramatically reduces the cost of shipping things into space. Previously it was difficult to ship anything much larger than a compact ca

The big thing is that it dramatically reduces the cost of shipping things into space. Previously it was difficult to ship anything much larger than a compact car in to orbit. Now you can ship half of a basketball court into orbit, including all the vertical space. Until very very recently the roughly bus sized ISS modules were the largest habitable spaces we could ship to orbit (although Skylab in the 70s were basically repurposed Saturn V fuel tanks and also big) so now it's possible/probable we can ship 20 people to space, and have moderately comfortable accommodations for them. We can also ship mining equipment and substancially more supplies to the moon. Or mars. We went from using pack goats to 18 wheelers to ship stuff in space. The pack goat can ship a handful of hand made silk scarves and Faberge eggs over the Himalayas, but the 18 wheeler can deliver everything from socks and tshirts to cell phones and big screen tvs and trucks and lawn mowers. This really opens up space to more than the highest, most bleeding edge science and we might actually see more than 100 humans in space at the same time, in our lifetimes.