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Slideshow app for Android received an update with peer-to-peer (p2p) communication between devices / players, allowing remote management of playback without a need for a server in the cloud.
New version of Slideshow - Digital signage app for Android was released today, with new playlist and layout scheduling, on-screen controls, customizable key mapping, triggers, face detection statistics and more.
I read that as well, but on Anbox GitHub (https://github.com/anbox/anbox/commits/master) there are some recent cosmetic changes, so maybe it is "just" sleeping, not completely abandoned :)