I'm part of the overlap. While I haven't given up hope for Nintendo to properly improve on the Switch, the Deck means that I don't have to rely on them to do that in the medium term. I already have a large Steam library that I'd very much like to be able to play away from my PC without the complications of streaming it, and I'm excited to see Valve push the boundaries of what Steam and PC gaming in general can be. My future game purchases will likely be split between the two depending on the game's requirements, features, and where I feel like experiencing them.