Samsung Tizen TV offers developers a great platform to create new and Interactive apps and games, breaking away from the shackles of only developing for Android & iOS. We have some Interesting news as the Accessibility ToolKit (ATK) will now be supported on the upcoming 2016 Samsung TV Line up, Including Text-to-Speech (TTS). This is a feature that is recommended by Samsung, but is not mandatory for you to pass Samsung QA. There is no news at the moment if ATK it will be brought to other Samsung TV ranges.
Good luck and happy developing for Tizen TV 🙂