Unfortunately technological progress is not always exponential. An human landed on the moon 56 years ago and people back then thought space travel would be a routine thing today so it'll be interesting to see how things go
When I get depressed and look out at the world, I'm actually amazed at what I'm living through—the internet, space travel, electric and autonomous cars, smartphones. It's really amazing.
Perhaps someday we'll have individualized space flight like we have ownership over our cars and private planes.
Don't know what you're getting at by saying the galaxy will be ruled by mega-corps. Seems pretty democratic so far, and most of the things achieved couldn't have been without organization.