Samsung’s Micro modular TV ‘The Wall’ has brought a new wave of attention for Micro. This next generation display technology, considered in some way better and more reliable than OLED, has currently been under development by high-tech companies around the world. Micro displays have plenty of advantages, such as high brightness, compactness, and color contrast, and outstanding durability of heat, that make them suitable for a myriad of applications. However, those advantages reflect the difficulty level of manufacturing Micro. It requires technologies from both the and semiconductor industries to bring it into existence.
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Some might wonder whether it will supplant OLED. The answer is negative as much as it can possibly surpass OLED in terms of share in some markets such as large-sized displays and automotive displays once it takes off. One factor that should really be taken into consideration is time. Micro developers are running against time. While they are developing Micro, OLED and other display technologies are also undergoing refinement. 
The chairman of Mikro Mesa once said Micro would be able to change the game if it can be officially rolled out in 500 days. Most of the companies that are developing Micro LED aim at two markets—the large-sized display and near-eye application markets.
For those who target the former, they have to overcome challenges to successfully mass transfer Micro LED chips; while for those eyeing the latter, they have to make sure the brightness of their inventions are high enough to present clear images under outdoor ambient light. Large-sized display, AR near-eye device, and automotive head-up display (HUDs) are markets where the Micro LED supply chain picks first to create enough revenue to support further researches on the feasibility of Micro LED technology being applied to other applications.
According to LEDinside’s latest research report, Micro LED is projected to generate a market value of USD 2.891 billion by 2025, 68% of which will be contributed by large-sized Micro LED displays. Related reading: Asia Taiwan holds a broad range of advanced LED and display technologies and that makes it top of the list of Micro LED developers. It is building and aims to deliver Micro LED offerings to domestic VR companies in 3Q18. 
Epistar, AUO, Innolux,, and Macroblock tries to expedite their development.
Meanwhile, Epistar along with some other LED makers such as EVERLIGHT also plans to for smartphone backlights and fine-pitch displays. It anticipates in the next five years. China started Micro LED development slightly later. San’an Optoelectronics began related R&D two years ago.