[carpal]

Well, not necessarily. Those devices aren't biped specific- they're specific to thing with grasping mechanisms.

Who's to say a quadruped robot can't have 4 feet + 1 or 2 grapsing mechanisms? Or have two front feet that are also capable of grasping?

[iamwil]

While you can certainly have a 4 legged robot, 2 armed helping you around the house or a hospital, only using grasping mechanisms to climb the ladder to adjust the satellite dish on the roof, help you with the dishes, or get you out of bed, I think it's important to consider the reaction people have to a robot's form factor given its job.

You and I might think it's really cool to have 4 feet and two arms (like a centaur!), but if a robot reminds someone of a gigantic insect, and it's suppose to be a household companion/housekeeper, people might reject having it around the house. That's a good reason to have bipedal robots.

But on the other hand, if you get close, but not exactly with bipedal robots, people might get even more freaked out with the uncanny valley.

[carpal]

Good point.

Personally, I'd love to have a robotic centaur helping me around the house.

[motley_fool]

Think Centaur.