In most kodi skins you have an option in your TV shows / movie collection to select.
- All videos
- watched videos
- unwatched videos
If you select unwatched videos, you'll only see the TV shows that have unwatched episodes. This makes it a lot easier to see if there are new episodes of the series i'm following. Now i have to check the series guide app every time if there's a new episode
Ooh but in kokotime there will be a notification system for addons which support it, when a new episode of a show you are watching is available you will receive a notification but only if the addons provides a list of newly added content