To be honest, the autonomous control of the robot seems like the easier part of the equation. (doing it safely in a room with guests, unguided... thats another matter). The physical limitations and packaging are a big challenge, and I dont think I saw Optimus lift anything remotely heavy.. just pull a beer tap.. a decision that probably speaks volumes about current limits of the technology. To apply my first point to…
When you see the bits and pieces of behind the scenes for Boston Dynamics it's clear that's where a lot of the magic actually is (and also if you look at how say, Atlas moves) - by necessity it looks much more "natural" because to get any power or speed behind the motions the whole robot needs to actively compensate the movements (obviously having enough power behind the drive system to actually do it is also critical).