> humanity has some deep desire or curiosity for robots to look like humans.

I don't think you can draw that conclusion. Most people find humanoid robots creepy. I think we have a desire for "Universal Robotics". As awesome as my dishwasher is, it's disappointing that it's nearly useless for any other task. Yeah, it washes my dishes, but it doesn't was my clothes, or put away the dishes. Our desire for a humanoid robot, I think, largely grows out of our desire for having a single machine capable of doing anything.