Samsung just announced that their Samsung Galaxy S6 & S6 Edge devices will start receiving the Android 6.0 Marshmallow update starting today (February 15th). They didn't share when the Galaxy S6 Edge+ and the Note 5 would get the update, but they did say, “other Galaxy devices will soon follow," so that's something.
Of course, each carrier will likely have their own vetting process so your mileage may vary for getting the update. This basically means Sammy is happy with the update and will be pushing it out to unlocked devices, and it is available for the carriers to fiddle with more aggressively.
There's one other interesting thing to note about this update. It will apparently include some additional features for the Galaxy S6 Edge's curved edges. This “Enhanced” edge will allow users to view more in-app content and add more apps. Also, the edge panels have been widened to 550px. This gives more room for more quick information and shortcuts. You can even customize up to nine panels. This includes the Apps edge panels and the People edge panels, which are slightly different now.
For even more of the details, check out Sammy's presser: Get Things Done Faster with the Newly Enhanced Edge Screen
Don't forget to drop by our Samsung Galaxy S6 and S6 Edge section for further discussion: Samsung Galaxy S6, S6 Edge and S6 Edge Plus