I feel like the big complication at the moment would be getting it to navigate outside of controlled environments. Mainstream tech is getting there (iPhone LIDAR mapping, Meta Quest room scanning) but there's still a lot of dots to connect for a robot far less inherently steady than a Roomba.

What I would bet we'll see at first is some of these little guys in Disney parks, in fenced-off areas or small stages that are kept meticulously clean by staff, where they can interact with visitors without needing to handle all the complications of the real world yet.