I could be horribly wrong, but with a disgruntled console market and SteamOS's success on the Steam Deck, a plug and play device along with a controller could be very successful at capturing departing console users and it would really give a kick start to linux gaming.

I know there's lots of people who want to try PC gaming, but are not sure how to or are scared to do so, a Steam Machine would be the perfect device for them, they could just plug it into their TV and be gaming in minutes, just like the simplicity of the Deck.