[Humphrey Hacker]

Must be remembered in the context of the Ofcom report, its traditional/linear TV being referred to.
You can of course watch streaming on the TV via either built-in apps on the TV itself, or via something like the Fire Stick.

The article seems to suggest older audiences are literally turning the telly off in preference of streaming, but that doesn't mean they will do that streaming on a phone or a tablet or a computer - as I just said that can be done on the TV.

The TV itself as a physical presence in homes probably isn't going anywhere.  Not while there are things to plug into it to expand the usability at least.  Sometimes you can't beat a bigger screen.  My parents quite often project a video or pictures onto their TV from the phone - easier to see and appreciate from their 55" unit than a 5" screen...

Televisions have morphed into intricate display units and while there are projectors a TV can't be beaten for familiarity.