Steam link for ROKU (or similar)

[MeltedLemonade]

There are a lot of games that work on controller, some made for it.
I've heard Steam link is the way to play steam games through you're TV.
Will we ever get a sort of "Roku device" that's specifically for steam, where you can connect a controller and game on a TV? I don't know if Roku has the capabilities to program in controller connectivity.
Apparently Steam link only works for smart TVs now, but I'd like to not have to spend all that money on a TV where I only bought it for one specifically singular feature