I see two different things going on. First, there's some market for humanoid robots, and Hyundai is spending a small amount of its R&D budget exploring the options.

Second, I have to imagine that there are spillover effects for their other robots. Being able to make legs that are nimble is good for the ability to make grabber arms for industrial robots. So even if the humanoid product line goes nowhere, they could end up with better material handlers.