I can dictate into both the remote control on the Chromecast which this sentence was done with. I can also use the dictation on my phone which does a better job and goes back and fixes things when it realizes it was wrong. The key issue is mistakes happen and mistakes get fixed without you even knowing about it. most typical is extra commas for when I pause for thought. My phone knows to go back and get rid of them when the sentence is complete, the Chromecast voice pickup is happy to put down whatever crap I say without thought.

Mouse pointer remote control is brutal using a regular TV remote. That's just silly.
But it works very well with the phone as a Bluetooth track pad.