New business idea: fitted faraday cages for smart tvs

In reality that'll never work because the front of the tV needs to be exposed. At best you can make your whole room/house a faraday cage, but that'd be insanely expensive to do correctly. You might think a microwave is a faraday cage, but a phone can still get calls even if you put it inside.

Some well placed copper tape on the back of the tv will likely get the job done in many cases.