So far I've held out pretty good, considering past sales. Almost re-bought a title I already had. LOL
Picked up Hard West, an X-COM style TBS game that looks really good. All I know so far is that they claimed controller support and it doesn't seem to be the case.
The Steam Controller is tempting, at $35.
Steam controller is a good companion to the Steam Link. Lets you play games that don't have controller support while sitting on the couch.
I picked one up and although it takes a bit to get used to at first, it really shines in playing keyboard+mouse things like XCOM on the couch via Steam Link.
i.e. I still use the XBOX controller for things that support it, but for things that don't, there's usually a Steam Controller profile for it, and the Steam Link supports having both plugged in at the same time.
I've been using Steam Controller + Steam Link to play Guild Wars 2 with my daughters while sitting on the couch, which in the past was a KB+Mouse only thing.