What if your Steam library is slim? Then this product might not be for you if PC Streaming is a prime concern. Serious gamers probably do have a healthy Steam library and you can add non-Steam games to your Steam library, though there's no guarantee they'll work. Happily NVIDIA didn't partner with Origin, which can barely run correctly on the desktop without grievous bugs. One more caveat: your gaming PC and the Shield must be connected to the same WiFi network, so you can kick back on the couch to be closer to your family when gaming, but you can't play PC Streaming games from a hotel while your desktop purrs along at home. And yes, your desktop must be turned on for this to work. While the Shield is connected, the PC's resolution is set to 1280 x 720 to match the Shield, and you can't use your PC for other things or it will kick the Shield out. Yes, you'll need to enable beta mode in Steam, at least for now (that setting is under account settings).