A Point of Information monitor has a distinctly different purpose to a domestic TV, and so the design from the ground up is done with a different end game in mind. The functionality of the monitor and the whole PoI ecosystem differs from that of a domestic TV, so while there are areas of overlap, the start point and the end game are not the same.
In short, what's easy to do with a domestic TV is hard to do with a PoI monitor system, and vice versa.
A smart TV with an aerial signal and Internet access can receive local terrestrial TV and run its built-in apps. On its own though it isn't designed to be part of a multiscreen display system in the same way that a PoI monitor functions.
Here's a specific example of how far apart the two systems are in design ethos and practical use. With a smart TV the user drives it from the display end. They choose what to watch at their own convenience. A PoI system is driven from a central point. A system administrator decides what is shown on each screen. The local viewer rarely has control.
Spending time learning how a PoI system works is largely irrelevant for the average domestic TV user: Two different start points for two different goals.
I have built high-end home entertainment systems for affluent clients where each TV can access a collection of centrally-located resources. Generally this is a collection of Sky boxes supplimented by Freeview, and a media server containing a library of the owner's movies/TV box sets/music collection, the CCTV system, and then live streaming feeds via the TV apps such as Netflix, catchup TV, Amazon prime. In addition there are local inputs such as a games console, occasionally a PC, screen mirroring from a tablet or phone, and maybe a local media player box such as an Apple TV.
Never in the 15 years I have been doing this has any client asked me for the functionality to run PowerPoint to some or all of the TVs.
So, are you trying to put together a domestic TV viewing system, or is this a commercial application of some description?