There are plenty of supposed Steam Deck killers available in the portable gaming space, from the Asus ROG Ally to the Lenovo Legion Go and all the Ayaneo and ONEXPLAYER devices in between. But none of them have managed to outright slay the dragon that is the mighty Steam Deck yet.
This is exactly what they need. At least a Big Picture mode where it boots to a launcher. That and they should scan all games on their computer. Not just Xbox games.