I took the liberty of looking at the Modern Era Techs. This is what I found:
Ecology - I'd say that's happening now
Rocketry - About 60 years old and going strong
Fission - Nuclear bomb anyone?
Computers - What am I using now?
Recycling - We don't use it as much as we should, but we have it
Space Flight - Say all you want about the Moon landings, but we've been to space.....sometime in bloody balloons!
Nuclear Power - Doesn't Japan have like 13 of these or something? Geography is but a distant memory now.....
Miniaturization - I'm not sure what this really is, but we do have offshore platfroms, I know that.
Synthetic Fibres - We can thank Mr Goodyear for an important one of those.
Superconductor - Possible, but we can't yet tap into it the way we'd like to.
Satellites - We've never looked back since Sputnik
Laser - Where would we be without Light Amplification by Stimulated Emission of Radiation? A lot more imprecise, that's what.
Genetics - If you haven't seen the big debate over it, where have you been?
Stealth - By definition we wouldn't know if it was here

..... but the USAF told us and showed us it, so it is here in our time.
Smart Weapons - The fact that they regularly make mistakes means they definately have some kind of intelligence

Robotics - Been to a Ford plant recently?
Intergrated Defense - The system's not yet in place, but we do have the tech for it.....we almost had one in the 80's.
The only thing that's 'future' about modern era is the Alpha Centauri thing.....which IMHO is stupid, it should have been the Moon Landing.
You may be wondering how I equate 'modern tech' with history - well if it's happened, it's history!