Watch_Dogs is pretty fun! Awful PC port, but still fun.
To elaborate, periodic framerate hitches, even on a decent system (i7-3770/GF680), very insensitive mouse controls (had to crank the sensitivity to make it feel right to me, and I know that some people would still find that to be too slow), touchy car controls (tap W and Aiden freaking floors it, so I just adapted by driving like a maniac everywhere I go). That said, it seems to be pretty stable, and it's still a way, WAY better port than GTA4.
I also beat Saints Row 4. Fun game, and tons of stuff to do! 97% completion after 16 hours...I need to get that last 3%.
And Steam's in-home streaming is pretty neat. About half of my play time on Saints Row was done on my iMac, in OS X. The only downsides are: 1) you can see very subtle compression artifacts, making it look like a high-quality Twitch stream; 2) since it plays the game in the foreground of the host computer, nobody else can use that computer; and 3) due to the method that it streams the gameplay, you can't render at a higher resolution than the display that's connected to the host (example: my gaming rig is hooked up to a 1080p TV, so I can't use a higher resolution display even though my Mac's display can do 2560x1440). No real biggie, and it's definitely nothing that I can see being fixed for obvious reasons.
I had one minor hiccup where Saints Row 4 minimized, revealing my Windows desktop, but I think that was because the Java auto-updater stole focus (because that's something that an application should do!).