Will We Ever Have Iron Man Exoskeletons?

From ExtremeTech:

The threatening grimace, exchanged in the wild by beasts armed to the teeth, has morphed among civil men into a warm but ineffectual smile -- a Faustian bargain we question every time a deep growl startles us on a twilight jog. Reports from the vanguard of science tantalize us with the ability to regain lost powers through the artifice of the machinist, however - when will these technologies be practical and what will they look like?

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