Efficient solar skin is likely more than a decade away. And the power it gets from just part of the surface of a human shaped body is little.

Calling back to the hive mind will indeed be a main way that robots solve complex things, but wireless data is imperfect and so there will be a significant percentage of issues where robots get stuck.

The more decades you look out, the more solvable those things are, but my post was about the next decade.