The "bug" thing is great, I've seen it before, yet I wonder how well it swims?
A blimp is a fine platform for video, yet the weather must cooperate.
The fascination with "walking" (to relate to as human, I presume), is a sad platform for transport. Personal, I agree, but functionally no.
The human frame is designed to transport itself, forward and to lift/carry very little. It has a heavy "footprint" (compared to a tracked vehicle).
Invent something that hovers close to the surface, with tiny to nonexistent "drag", undisturbed by weather, solidity, viscosity, slipperiness.
DEVICE .com has already shown UAV's that fit in the palm of your hand. Any soldier (or other) can carry a pocket full of them.
The warriors/spies of the future will be small, and the vehicles will have reduced "touch".
I expect anti-gravity, deflected light (stealth), hovercraft to be the workhorses of the future. Probably with Helium 3 for power, and superconductors for a friction free ride.
That is until we blow ourselves up with antimatter. Who knows what we'll do with Pandora's Box.