One of the reasons for buying a Smart-TV was the capability to connect to the web, watch videos and listen to music. I installed the Spotify app from the LG TV-app store and was very disappointed with what I got. I cannot brows radio stations or playlists, I need to know a title to find any music, I cannot browse by mood, etc. The app contains maybe 10% of what iPhone or desktop versions can do.
Running all sorts of services though Smart-TVs is the future and I hope that Spotify will very soon come up with a viable app! Other services provide for much better integration.