The Asteroid Harness is giving me flashbacks to Homeworld and those glorious glorious capture ships. Why blow something up when you can borrow it, you know, forever.
Beyond that, we now technically have a weapon to put on our ships. In essence, we have an oversized sling, ready to throw nice big rocks at space goliath.
As cool as unlocking a wonder would be, we do not have anywhere close to the amount of materials needed to successfully pull it off. The Microgravity Electrolysis would be an extremely useful thing, but I don't see Ok, scratch that, M.E. actually gives us access to Orbital Silos, which means we'd be able to keep our fuel in space and not have to pay gravity the exit fee for every bit of fuel we send up. That's extremely useful, and who knows, more experiments on how fire works in 0G could be good for our SCIENCE!!! meme. Granted, such experiments would be "Can Reaction Mass create a false aurora if detonated in significant quantities?"
Fusion Pumped Lasers is also an interesting tech, since it will allow us to move away from the Giant-Techno-Sling and into some proper weaponry, which would be a good deterrent for a while. Not as useful as having a proper shipyard, so onto the back burner it goes.
So, time to do some approval voting.
[X]Microgravity Electrolysis
[X]Orbital Shipyards