Nest’s problems are symptomatic. Only 6% of American households have a smart-home device, including internet-connected appliances, home-monitoring systems, speakers or lighting, according to Frank Gillett of Forrester, a research firm. Breakneck growth is not expected; by 2021 the number will be just over 15% (see chart). Too few consumers are convinced that the internet has a role to play in every corner of their lives. A survey conducted in Britain by PricewaterhouseCoopers, a consulting firm, found that 72% of people have no plans to adopt smart-home technology in the next two to five years and that they are unwilling to pay for it. Last year consumers globally spent around $60 billion on hardware and services for the smart home, a fraction of the total outlay on domestic gadgets