Digitimes posted an interesting interview with Epistar's president, Jou Ming-Jiunn. Jou says that the most optimistic sceneraio is for micro-LED displays to enter production by the end of 2018, with real devices appearing in 2019. There are still challenges ahead though, and Epistar's customers have not yet committed to anything.
According to Jou, there are two main routes to the market for Micro-LED makers: VR/AR or wearable displays and large-area TV panels. It is not clear yet which will route will arrive first.