Wow, this is really fantastic! THANK YOU!
On the 360 thing: How is this JTAG Hack any different from the previous 360 firmware cracks? Also, there are a few things that make me not excited about this:
1. The emulators are going to be new/buggy. The XBox1 emus have been refined for years. Its going take a while for the ball to get rolling.
2. I don't think porting the Xbox1 (or PC) emulators is an option. Its my understanding that the 360 is running on a PPC derivative CPU.
3. 360s break, a
lot. Every one of my friends that has (had) one have have them crap out multiple times. They were really poorly designed.
Just my 2 cents.

Yeah it constantly refreshes temps & adjusts LEDs accordingly (as long as Freestyle is running)
When you launch a game the leds stay @ whatever they last read when you exited Freestyle. They update normally again if you go back to it.
Will be a long time before we can add led changing support to the kernel (so the leds can update in-game)