The original note, as written at the time
A transportation concept with multiple roller mounted track systems like those on a tank. Instead of two, these can be four or three, allowing the vessel to stand up like an animal or a person without necessarily having a complex limb based mobility.
Ongoing development
A transport concept built on multiple roller-mounted track systems, like a tank, but with three or four tracks instead of two — allowing the vessel to stand up like an animal or a person, without needing a complex limb-based mobility.
The insight is that a leg has two functions and a track can do one of them much better. A leg provides support and it provides the ability to change the shape of the stance. Tracks can provide the support cheaply; what they cannot do is change geometry, and that is exactly what extra tracks give you.
Three tracks arranged as a tripod can raise the body by tilting them, so the machine stands without a single articulated knee. Four tracks in a cross can do it more stably and go further. The complexity moves from actuation to control, and control is the part that has become cheap.
The terrain trade is what makes this interesting. A wheeled or legged machine handles obstacles by precise placement. A tracked machine handles them by contact area, which is why tanks cross mud and why this would be useful in exactly the places where a normal vehicle fails: wet ground, rubble, construction sites.
The cost is efficiency and wear. Tracks on hard surfaces are draggy and expensive, so this is a machine for a building site and not a shopping trip.
The right comparison is not a person standing up. It is a camera tripod that can walk.