I don't see at all what this has to do with nature. I just see this as the same thing as any other loving robot, except with interchangable parts.
Thats not to say that I don't think its cool and if I had the money to waste I'd definately get some. but this thing that its like creatures in nature.... I don't know any animal that cannot see or hear or whatever on its own but somehow acts as a not-gate, which then fuses with another creature that can see, and with a creature that has the ability to move and then they all move. If such a thing existed, I would think it to be rather creepy.
It'd be like the human centipede if two of the humans didnt have legs and two didnt have eyes.