I have a tv that i used it only for a while as a monitor to display a personal dashboard with the local weather and some rss feeds using flask in a raspberry pi zero. I might do it again in the future if i find time to implement also calcurse or something similar on the dashboard that can be synchronised with caldav. 
I never had a microwave and i never will. I use something like this
https://image.nostr.build/10f42874307f3fe85613b152af82f77c65e380cd55f313d50db75e36168df296.jpg 

 It's a common practice now to use it as a monitor instead but what is that gadget? A roaster?  

 Yes and itbuses air and heating and it has a timer. So if you want to warm up something it is very handy. Microwaves are not healthy...