Manual dexterity in robot hands is qualitatively different from classical robotics where the control model was framed based on pose of the robot and the tool, maybe an on-off grasping, and following trajectories.
Hand isn't just for grasping. You can use it to do all kinds of things from playing different kinds of instruments to communication with sign language. If your robot is hardcoded to carry items by grasping them by their hands only, one item per hand, you have probably never seen the ingenuity of humans with too many things to carry and a deep reluctance for making more than one trip.
You can do what everyone does; handle the hand as a special tool. Just bring it to a positions and send it commands, "grasp", "release", "play guitar", ...
You just need to preprogram all these things separately, and then maybe train a higher-level model with imitation learning to use pixel-level goals to create a sequence of arm positions and hand commands to fold laundry.
This becomes incredibly brittle and inherently unscalable.
It would be way better to have a better framing of the robotic control problem, embodiment, and train a generalist model end to end on it. With modern AI we aren't limited to rigid control framings like describing the poses and positions, but we can simply use natural language for it. "Pick up the red ball", or a more complex "put the cat into the carrying box".
These natural language descriptions along with other contextual data can be used to produce a control model in-context for the real-time low-level control of the embodiment. Such a holistic, embodied control is a requirement for more complicated tasks not artificially limited by the control problem framing.
All this is yet partially unsolved, but everything needed to build such systems is already there.
Hands aren't tools, and many of the difficulties we have in bringing AIs to the physical world is because we're stuck in old paradigms and old ways of thinking. More holistic ways to understand and talk about embodied robotic control are needed.
