I finally installed the beta the other night, and had been waiting for my GTX 1060 to arrive. After installing my Graphics card, and testing the S192, I can say that this firmware works really well. I had some overheating issues the first day and a half, but after resetting and wiping everything after install, that issue went away. Last night I was able to stream FallOut 4 to my S192, and it played flawlessly.
I can confirm that all of my shield exclusive games that i purchased in the past for my Shield portable and my shield tablet still show as not compatible with the S192. Otherwise everything works really well. It appears that the battery usage during standby, is greatly improved. My S192 sat for two days untouched and lost only about 2 percent battery life.
Thanks for the hard work you put into this. This weekend the kids will be at the in-laws, so I can game until my thumbs bleed, and it will give me plenty of time to test this firmware. I look forward to updates.