In the universe of Roku, I've played a lot with watching Netflix on the TV.
If you have a computer attached to your TV, you can use Boxee, which has a pretty good Netflix app. (XBMC, which it is a fork of, is a lot better at actual media files for lots of geeky reasons, but it can't do online content.)
If this living room computer is a Mac, you can use Plex, which is another fork of XBMC but is better than both Boxee and XBMC at everything.
Or, you can run Kylo, which is a browser designed to be used from far away on giant screens.