The traditional living room has been transformed into a digital media hub where the household watches television while multi-tasking via tablets and smartphones, Ofcom said.
Households are increasingly reverting to just one television, and 91 percent of adults tune in to the main set in the living room at least once a week, according to Ofcom's annual "State of the Nation" report.
A quarter of viewers regularly partake in "media meshing" - using devices to communicate about the programme they are watching.
Of those surveyed, 49 percent said they engage in "media stacking" to carry out completely unrelated activities such as social networking or online shopping.
More top news
Tens of thousands of people have joined demonstrations the length and breadth of the country following the death of a black man in police cu
The Met Office said the UK has recorded its sunniest Spring since records began in 1929.
The return of pupils to classrooms as restrictions ease leads the front pages.