recently we conducted a study about Smart TV. We were trying to find out if Smart TV sets are intuitive for beginners, but also how the expert users use it - so it could help us with designing any software for Smart TV.
We’re sharing the knowledge with all designers - download the report here - http://witflow.com/en/case-studies/smart-tv.
Please, let us know what you think. If you know any other source of guidelines for Smart TV UI design, share it here! :- )