How far have we really come since then though? Airplanes and automobiles were already in production, energy was being used, modern physics and medicine had been/was being developed. The framework for our scientific advancements were laid out for us in that era.
I find one thing common around the tech boom era is that people vastly overestimate what we will be capable of in the next few decades. You can look back to movies created in the 1980s that portray our time (>2000) owning flying cars and hovering skateboards. Viewing those movies now we think "how silly" yet we do the same thing when we talk about interstellar travel and weather/tectonic control within the next 100 years.
I guess time will only tell.
I dunno, I think it's a bit silly to compare automobiles of 1912 to 2012 and downplay that achievement. You have to consider the range of the car now, the fuel efficiency as examples. All the small features within a car, like hands free calling as you're driving, the ability to have USB ports in cars now to hook up your smart phone to stream media from.
The same goes for airplanes and the efficiency and range of those. The fact we've successfully landed a rover on Mars. The fact we actually put human beings on the moon. We've traveled to outer space and can have people actively living in the ISS outside of our own planet.
Looking at it from a militaristic point of view, the way wars were fought and the weaponry used in World War I to what multiple nations are now capable of.
Lines of communication. I can INSTANTLY connect with anyone anywhere in the world at anytime. That's brilliant. What used to take weeks to inform someone of now takes seconds.
From a cultural point of view, the advancement of civil rights. Doing away with segregation laws, allowing gay marriage, etc.
The evolution of a phone for example is quite an improvement. Old rotary phones to literally being able to access any content at any moment in the palm of your hand from your pocket is incredible.
I think you're really underplaying it.