Can I use this to show a live HA dashboard on my TV?

[ptrnmgr]

the title says it all...

[Trooped]

Hey, definitely not - there were already apps that tried doing this (and it didn't work out well).

QuickBars takes another approach to control Home Assistant from your TV, which is more intuitive than a dashboard designed for mouse/touch use.
Check out the website for more information.