@izzythepush,
This guy's suit design is different from the others I've seen, but that's because he'r trying to "copy" the Iron Man Suit designs with hand-repulsors and all that.
The old designs used a contained reaction mass (propulsion fuel). This guy seems to be using small Jet Engines, so he doesn't have to carry his own reaction mass. But he's still got the "big" core problem to deal with and that's his energy source.
Portable power sources are where the comic books really have an advantage. We simply don't have anything comparable, and if we did it would change our societies in more ways than just jet packs.