Robots are getting more social. Are humans ready?

Personal home robots that can socialise with people are starting to roll out of the laboratory and into our living rooms and kitchens. But are humans ready to invite them into their lives? It's taken decades of research to build robots even a fraction as sophisticated as those featured in popular science fiction. They don't much resemble their fictional predecessors; they mostly don't walk, only sometimes roll and often lack limbs. Worse, they're so far losing out to immobile smart speakers made by Amazon, Apple and Google, which cost a fraction of what early social robots do, and which are powered by artificial-intelligence systems that leave many robots' limited abilities in the dust.