You could subscribe for personal robot serving you only but you could also subscribe for being able to use any nearby roaming robot of that company. Or you could combine those subscription plans. You could also rent a roaming robot for singular task, kind of like how uber works.

Now there is a question. Would it rather be that some other companies would develop special software for special tasks and provide it to the robot building and renting companies or would it be other way around that certain robot developing and renting companies would rent robots to the companies specializing in providing special services with special software so they would act like middle man between the end customer and the original robot renting company.