I've been using Plex for a couple of years now, and I've been waiting for a proper implementation of this feature. I have tried searching these forums, and to my understanding there is some barebone version of this in the web app and home theater app, but it's archaic and unintuive. Playlists kind of work this way, but are way too much of a hassle. What we need is something simple. This is a feature that deserves to be easy to find and use, at least across the major platforms. (iOs, android, Chromecast, Roku and desktop/web clients I suppose, I don't have the install base numbers).
What I want is that after playing an episode of a TV show, Plex will play the next episode automatically, maybe with a few seconds break, and continue to do so until I stop the video. This should of course be based on the episode I'm watching, and it should play the next episodes in the correct order. This can either be something you "activate" everytime you start watching something, or it could be a setting you can enable or disable by default in the app settings.The point is that it needs to be simple, intuitive and consistent across platforms.
I of course understand that manually selecting a new episode isn't much of a hassle for a lot of people. But to really get that comfortable couch viewing that cable TV still is the best at providing, finding your keyboard/smart phone/pad/remote every 20 minutes when watching your favourite sitcom really isn't ideal. It breaks up the flow and forces the viewer to make a decision every time you finish an episode. A lot of times while binge watching you don't want to have to make that choice ... :P Netflix understands this.
Am I the only one who really wants this? It's easily my most wanted feature.