Are you sure that you have the right image about the today's technological capabilities? Do you think that science fictions are over-zealous? Do you think of them as "stuff that is never gonna happen" or "stuff that's not gonna happen in this century"? You'll have to think again..........
Try Ancient Aliens documentaries. Those episodes will make you re-think your opinion even on technological capabilities of ancient times. The truth is the world can offer more marvels than you think. Just think about the advancing of technology during WWI, WWII and cold war.
We are actually seeing aged technologies as modern stuff. Think about the "Advance Military Weapons". Most of them are at least 20-30 years old. You are not even seeing most of the today's real technological capabilities. The truth is G.I. Joe can be very much realistic than you think. You must always think so many times before assuming that something is too much or impossible for modern technological capabilities. The over-estimations can be more accurate than the general accepted idea. Fictions can provide better insight into future than the methodical and crappy predictions.
You can also check this and this about to get some insight on the role of humans in the future society.