Plex have just released a brand new Plex app for Roku for Plex Pass subscribers. As you can see from the screenshots it looks great and supports music, videos, cinema trailer, Plex Home and Plex Companion.
It works with Roku 1/2/3, Roku Stick and Roku TV. If you are a PlexPass subscriber follow the following steps:
Log into your Roku account at https://owner.roku.com/add/PlexPass
Press the “Yes, Add Channel” button
Return to your Roku and visit ‘Settings > System > System Update’
Choose “Check Now” to (force) update the channels on your Roku
It looks much better than the old version brings the UI up to the Xbox, PS4 and Windows app standard. If you have a Roku check it out.