So I basically have God in a box? Like, full on reality warping to suit my whims? Well, shit, this is gonna be fun.
First things first; space colonies. We've had them since the 70's, a fuckhuge industrial plant on the Moon, powered by fusion, which we've had since the late 50's. Hell, the whole Moon's a giant super factory, because fuck yeah. Also, pollution control or some crap, but seriously, do I need to justify fusion powered moon-factory? Of course not.
In addition, there are at least 8 major, 10,000 or so pop international civilian colonies in space under UN mandate. Mainly used to study the effects of life-long zero-g on the human body, with a secondary effort on zero-g engineering studies and colony ship design. Their third role is cryogenic storage; in case the world nukes itself, the colonists are stored until the survivors can calm the world enough to be repopulated.
Barring that, tech three is artificial wombs. Full-on vat babies. Instead of pregnancy and childbirth, you just order up a kid, undergo some psych and financial checks, and nine-months later, the hospital calls you up and you pick up you're new baby. If the world blows up, we just start pouring out the babies by the truckload, let them be raised by nannybots. Of course, Mars is a giant repository of frozen sperm and eggs, from everyone we can get them from, ready to repopulate Earth or the stars. Also, mars has orbiting "colonies" staffed with some scientists and back up facilities, in case Mars gets nuked too.
Medical tech includes full bore nanotech, able to combat cancer, obesity, plaque build-up, repair massive internal injuries, basically anything involve precision internal destruction or rebuilding of a human body. Load 'em up in a syringe and wait a couple of hours. BAM! No more cancer and your body is sculpted to perfection. Also, your arthritis is gone. Have fun.
Lastly, mini-nukes, Fallout style. Military only, but yeah, they're a thing now. Just because.