What your point on Robot Arm like product?

#1

Recently,many robot arm likes product show up,they have similar function and exterior.What do you think of them?
How could a robot arm product become a hot thing or a useful thing?
I saw the Dobot arm product in the forum,it seems very cool and useful, it is high precise. But i think these are not enough, i don’t know what it lack of.

#2