Today's Iron Man!
Several forms of Iron-Man can exist today, just not the full package portrayed in the movies.
They were first called Power assist suits. Now prosthetics.
The technology to make the pulsars that the original Iron man used as weapons and propulsion is not available YET! However it can still fly by a quad-copter platform or the wearable jets with wings.
Iron-mans unlimited power source is just out of reach, with Hydrogen gas motors or piezoelectric generator coming on line soon should help.
Mind control is a long way off, the human body rejects foreign connections, and external reading is not fine enough.
Simple pressure sensors are capable of controlling an Iron-Man suit movements and with communication links a few thousand at the same time.
Heads-up displays and voice control commands are very good today and will only improve.
Environmental control would require massive re-engineering.
For me Dr. Rodney Brooks has the correct answer."Build many inexpensive robots and send them out, if you 1 or 2 no big deal." I have designed a human controlled robot that could replace solders, Bomb disposal, Firemen, Police, Pilots, Seals, Radiation workers, rescue workers, any dangerous occupation. The WALDO could be the size of a 3 year old to King Kong. "Size not Matter".
The power assist suit not only can support the disabled and allow normal functioning but allow any task to be performed at optimal strength levels (adjustable) and allow many repetitions which I suspect the physical trainers would call muscle toning.
