Definitely the number is gonna increase dramatically next year with the Steam deck. Unless it's going to fail in some major way.
Speaking as someone with a steam link and controller floating around their house.
Even if it fails as a portable gaming platform the hardware sounds very decent and I wouldn't expect them to have Apple level margins on those.
I've skipped the link/steam machine because "livingroom entertainment" isn't my thing, but I was pleased with the quality of the Steam controller. Although I would have liked them to be bold with the design and keep just the original prototype (without thumb stick/face buttons) (wouldn't have minded a novelty controller that works well with just a few games).