You must have seen any popular tweet.
LiveView is not just for games.
Ground breaking changes.
There have been changes which have been altered. If you are referring to any blog while liveview, there are possibilities the code may not work. Do read the changelog file.
You can use Phoenix hooks to add more effects like drag-start, drop, drag-end, etc.
Here are link to popular blogs and videos.
code samples for reference.
Link(s) to github repos and quick description.