The Multi-device Timing CG is mentioned in recent W3C highlights  of March 2016, under the entertainment section. Web synchronization is also mentioned as overlapping work in the telecommunications section. Finally, cross-device synchronization is one of three headlight topics for 2016.
Though not explicitly referenced, multi-device temporal control is also relevant also for other highlight activities, such as Second Screen Working Group (synchronization and distributed control), HTML Media (timing provides Web apps with more flexible control over video content – addition to MSE or alternative), and Digital Marketing (ads exploiting temporal context, timed multi-screen etc.).