Well, my TV has that built in. I just start the Screen Share app. Sorry, I don't have any experience with Chromecast and those dongles...

I feel you wouldn't have asked for wireless displays if this was an option... But what I did for my laptop and desk is: get a plain old (used) USB-C dock, for about the price of one of these dongles, wired that up to my speakers, monitor, LAN... Now I have to connect one cable to the laptop and it's connected to everything, plus it gets charged. Doesn't require any configuration whatsoever and as a bonus I tested some other people's laptops, my phone, and they all work.

Probably not all that great if you use a tablet like it's meant to be used... I mean I put my laptop down on the desk and use the keyboard, so I'm not worried about a cable attached to it. If you want to hold a tablet in your hands, this might be annoying. I get that.