'Gadgets such as Alexa and Google Assistant are becoming increasingly popular but people are being warned of the dangers of filling their homes with smart technology.
Televisions, thermostats, door locks, light bulbs, bathroom scales and toothbrushes can now all connect to the internet and collect and transmit data about personal behaviour.
Two university academics have questioned what happens to the data collected by these devices and who then uses it - because data is now a prized commodity, which they say is now as valuable as oil.
Professor Chris Speed and Joe Lindley, who are experts on the 'internet of things', also cautioned about security, saying smart technology is susceptible to hackers.
The pair were speaking at an event at Cheltenham Science Festival discussing the impact the 'internet of things' and technology has on the home.
Mr Lindley, from the University of Lancaster, said technology companies were increasingly using smart technology to sell products and monetise data collection.
'You probably don't need a new television but 4K was invented to sell more TVs,' he said.
'You don't need 4K because you can't tell the difference between HD.
'Another benefit is that if you have an internet connected smart TV, it's more likely than not reporting back what you are watching and when you are watching it.
'The company you got it from knows who you are and they can monetise that. It's part of this data economy and data is the new oil.'
Professor Speed, from the University of Edinburgh, said smart technology could be used positively in the health sector to diagnose disease but warned of the problems of regulating that data.
'There are third-party relationships between Google and the NHS - it means that if I'm sitting on an 'internet of things' toilet in England I don't know where my toilet activity has gone,' he said.'
Read more: 'Data is the new oil': Rise of internet connected smart products means our private information is increasingly valuable to companies, experts warn
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