[Samsung Gear S3] Phanlix:
1) No one knows, last announcement was a month ago in October, it was a vague and no solid date was mentioned. Hopefully soon!

2) The kernal was leaked and it's possible now to root and use Android Wear. To my knowledge the dial hasn't been made to work with it, and rooting permanently disables Samsung Pay.

3) Find my phone is the single most useful part of the watch, that and the warning when it disconnects from your phone. No more losing the damn thing! It's defaultly installed.

My first click to the right takes me to my music controller. It works with virtually any music or video playing app and I use it when driving and listening to Amazon Music. Allows me to next songs from my wrist and I don't have to take my eyes off the road. Also useful with Bluetooth headphones while walking or jogging. You can see the song dial up and down sound, next, back and pause. Weather channel app is my third screen, calandar and step app come next. I use the timer all the time via voice, two taps lower button "set timer for 25 minutes" done.

Samsung pay is sweet, press and hold the top button, dial to your credit card, and swipe. Works with legacy credit card readers which is basically magic to me.

My Nest thermostat works with it. Worth the 2$ app fee, I can control my thermostat from my wrist... Over the internet.

My watch face, all in one carbon has weather, heart rate, date and time neatly displayed and easily read (also a paid app of $2).

Find My Car is great for tagging your car on GPS in a parking lot.

Taking calls on my wrist makes me feel like **** Tracy.

4) Am I satisfied with this watch? Emphatically yes, it makes my life more convenient in that I can use it for a number of things without touching my phone. Music controls and find my phone alone would make it worthwhile. Plus it's taken some good dings on my wrist and although the black paint is a bit scuffed, the watch face is immaculate. I've also taken it kayaking and it's been submerged pretty good so it's been solid in water.

However here's my complaints about the watch, it is not without some flaws.

1) when I got this thing the s-voice was totally unusable. It still is pretty awful. "Sure man" being translated as Sherman has become a running joke among my friends. I've had limited success in launching apps in a quiet environment, with any background noise forget about it. Even since the major update it's still awful compared to Android voice. While we're on the subject... Bixby also blows.

2) The nest app lags, occasionally my weather will stop updating to my main watch face for no reason, and other annoying bugs pop up now and again.

3) There is a shortage of apps. A new weather app would be so awesome. I personally am not a fan of the weather channel app and it's inability to display hourly information, instead choosing to do 4 hour chunks.

4) it can be super hard to get dirt out if the bezel.

5) It does not integrate with any other message app other than Facebook and Samsung messenger. This really bugs me because I love the Google messenger app. If you have another model phone, return it, it doesn't play nice with others.

In short. It does a lot very well, but there's room for improvement. I still think this is the best watch you can get, and I'm hopeful for some updates and new apps. But as it is after 6 months of daily use, I can say it will be on my wrist for years... It's far too useful.

Hope this helps.