There are a number of Drupal 8 modules which are making use of Popcorn. The Advanced Tour, Advanced Tour UI and Intermedia modules all make use of Popcorn. While the Advanced Tour was created because the core Tour module wasn't architected for Intermedia all of them make use of Popcorn and the Intermedia module is getting a lot of Drag 'n' Drop stuff being developed, some of which goes in directions that Mozilla's Popcorn Maker developers might find enlightening. Recently an Alpha 6 version of Drupal 8 with all of these modules installed was tested on a Raspberry Pi and performed flawlessly. It will be interesting to see if any functionality will crossover as the Advanced Tour UI has stub plugins at the moment for both the AIRTAME and Google's chromecast. All of these modules have REST resources and the Advanced Tour is able to interact with its YAML files via REST.