KDE Plasma Bigscreen

Doesn't have a lot of features and at times is a UX disaster due to inclusions of Plasma Mobile components.

• There are 2 (3?) settings panels: System Settings (what we have on desktop) and another settings app from Plasma Mobile. Also at the bottom of the dashboard there is a "settings" section which configures individual settings like WiFi, Bluetooth, Wallpaper etc.
• On the top there are WiFi, Bluetooth and KDE Connect indicators. Activating WiFi and KDE Connect will open a configuration window which doesn't have all its elements visible in its default size. You have to resize the window with mouse.
• Plasma has a "remote controllers" program which remaps game controller input to arrow keys, OK / back and Home. That program at times started using %100 of a core and required a kill & restart. Also you cannot map to Volume +/-. I used AntiMicroX to fully map my controller. (DualShock 3)
• Mouse does not auto hide.
• At least it can launch applications. Plasma BigScreen is basically skinned Plasma Desktop so with keybinds I could Alt-Tab between different applications, (IPTV Player, Firefox) return to dashboard and kill apps with keybinds. I even used Waydroid, it required some hacks but worked anyways.
• I didn't use Mycroft. It is supposed to make BigScreen better but my usecase didn't need it.

You dont. You install it on a Rasberry Pi for example, which you then connect to a tv screen :)