Only a single working "Catom" is ever shown, all of the other presentation materials show only crude computer 3D renderings and simulations.
However, don't see any evidence that they have physical prototypes of multi-catom swarms. Seems like they're more interested in the controls side of it, which is itself a very difficult problem.
I imagine physical constraints (such as the amount of power needed to engage the device's electromagnets) would render real constructions impossible. I'd loved to be proved wrong, though.
This is basically the microbots from Big Hero 6
The Terminator 2 T-1000 was a kind of fine grained catom bot.
Anyone know what became of it?
