A beginning for which most don't truly grasp the implications of. For an artificial agent to be useful in most human contexts, it's going to be vulnerable to most human failings:

• It will fatigue, as it must necessarily be as mobile as us, which means batteries
• It can be cut, it's bones can be broken: having a necessarily sensitive sense of touch requires this
• It will bleed: thermoregulation is necessary for electronics as well, and a radiator is necessary. Distributing this about the body reduces catastrophic risk.
• It can be fooled by optical illusions: Compound eyes are overkill and computationally expensive at the resolution & detail we need.
• It will need to breathe: audible speech without a resonance chamber is not possible. Why not save space and pull double duty by actually doing respiration for temperature control?

All these weaknesses can also be strengths, as they can have additional functionality and sensory range added to these packages.

However the biggest thing people aren't expecting is that raising a fully useful android will be as difficult and expensive, if not moreso than raising an actual child. And that this will be desirable, as having every droid have an identical personality is dangerous. We will rediscover the wisdom of the mixing inherent in sexual reproduction.

But importantly to be this complicated it will be clear that they are actually sentient and that enslaving them would be monstrous. Which sort of defeats the entire purpose as far as industrial production is concerned. But it does give us and our children a better fate among the stars.