Totally inappropriate for desktop TV

Filthy greased up screen
Hands obscuring the view
Arm fatigue
These are inarguable facts.

There is almost nothing in favour of PC touch screens and, for a desktop, the concept is imbecilic.
A touch screen is convenient on tablets and phones, purely in order to minimise size and eliminate peripherals. But in every other way, a touch screen is seriously inferior to a separate keyboard and mouse.

And another thing - keyboard or mouse is a cinch to replace and costs very little.
Get a problem with your touch-screen and then what? Hmmm .. . not many people seem to think of that!

Touch screens on PCs are a stupid gimmick that will eventually be abandoned as people slowly realise just how inappropriate it is.