On 31/05/2018 17:46, Harry Bloomfield wrote:
It suggests that the TV can put on its display, a copy of the wallpaper
hidden behind and by the TV, so that the TV became less visible - if I
am understanding the ad properly? That suggests the TV will need to be
on and operating at least its display all the time - Might not that be a
tremendous waste of power and to be discouraged?

Some can do very convincing aquariums too, but they do use power but
less than a real marine aquarium. Of course you would connect the Pi to
a sensor so it didn't bother when you weren't there.