Dark Souls 3 ran flawlessly, and I played about an hour of the original Dishonored with no issues and settings maxed out. Thankfully, everything else I tried after that fared better. Weird, but I decided not to question it and get into some gaming. Out of frustration, I tried a wired Xbox 360 controller instead. The Steam controller, at least for me, was unusable. Fresh batteries and a controller update via my PC didn't seem to make a difference. I plugged the Steam controller's wireless dongle into the Samsung Smart Hub's USB port, and it did recognize it, but it only accepted one out of every 10 inputs or so. The introductory post on the Steam forums said that the beta version of the app currently only supports the Steam controller.

Now here's where I ran into a bit of trouble. I have both wired with Ethernet, which is ideal (and probably mandatory, at least for the PC end) for good quality streaming.

Launching the app brought up a familiar Steam in-home streaming interface, and the TV saw my PC on the network right away. Getting up and running was as simple as searching for Steam Link on the TV's app store, downloading it, and making sure my PC was online.

Steam link device 4k