It's ashame that the roll out will take a year to get it. I still haven't gotten the OS9 update. It doesn't matter though my new TV is coming soon with Tizen.
I have Tizen in my TV, and it's not all that great. I stopped using any of the smart features on that TV long ago. Its DLNA player is terrible, both the UI and actual playback. Your new TV might have a newer version of Tizen than mine, but Samsung seems to be going backwards in their DLNA support. As far as the other apps, I preferred using first my Roku 4, then an Ultra, and now an Nvidia Shield. Especially with the Shield, the experience is far better than the Tizen interface. But my Roku Ultra was also far ahead of Tizen as well. I wish I could buy a new TV without any "smart" features, because players like the Shield, Roku or Fire TV offer a vastly improved experience than I've seen with any TV interface.