If they weren't already heading towards the bin, there's no way they would seriously consider this. So, yeah. Enjoy your black screens where the ads "should" be in a few years when roku goes tits up.
I'm guessing Roku wasn't happy selling decent streaming sticks and a TV OS that more or less just works; they had to go down the enshittification path because Number Must Go Up.
Late-stage capitalism claims another victim, I guess.
A lot of games no longer have the traditional pause. Pause goes to the menu. Sometimes the settings menu, sometimes the character gear menu or similar. Throwing an ad over menu items you need to access would piss me off even more than ads already do.
And if it's anything like their streaming boxes, pressing a button on the controller will select the ad instead of resuming your game. Happens too frequently that I'll pause a show to eat or something, screensaver comes on and when I press a button on the remote it launches the roku channel instead of resuming the show I paused.
When it gets impossible to find tvs that stay out of your way, I'm going to become obsessed with crt monitors. Learning how to maintain them to keep them running literally forever seems like a more achievable goal than doing that same thing with normal unshittified flat-screen tvs.