I moved my main PC rig into the front room corner, connected to our TV.
I use my Macbook as my main day-to-day PC.
With Steam in-house-streaming (wired), I'm using my Macbook to "game".
I've been primarily playing Dirt Rally and F1 2013, but also a little Fallout 4.
In the 50+ hours I've used the streaming service, I've had < 5 "hiccups".
The video quality vacillates between very good to good... the difference being that "very good" looks damn near native, where "good" looks like a moderately compressed JPG stream.
You can put basic stats up on the client (which I have up), and I seem to get 60fps consistently.
The one issue I do have is resolution - my host PC is hooked up via HDMI to a 1360x768 tv. My desktop monitor is 2560x1440, and I try to run at 1920x1080. Frequently, switching the game to 1080p will result in a weird resolution coming thru - it can take me 3-5 times changing the resolution back/forth before 1080p will "stick."