

I think it is just a desktop environment for linux. So it probably wont work on TVs by themselves.
EDIT:
Reading the article now, and I can see why you thought that. I was getting ready to eat my words.
it aimed to turn regular television sets into smart, Linux-powered devices
But on the project page it says:
Plasma Bigscreen is a user-friendly, open-source interface designed for devices like HTPCs and SBCs connected to TVs and projectors. It provides an intuitive experience that allows for easy navigation from a distance using remote controls. Discover an engaging environment that adapts to your preferences, offering the safety and privacy protection that come with the Free and Open Source Software.
It does say that you’re right.