I am not sure the concept of "emerging market" has much relevance any longer...mainly due to "time". Manufacturing has gotten so fast and mimicry so entrenched as a business plan that anything emerging this year won't be emerging next year. It will either be fully emerged or, worse, stale. Companies look at what Apple did to some markets and are now determined not get Appled by Apple or anyone else. There is an article on NYT about how companies are evading anti-trust laws by buying any startup that looks like it might become a competitor.
Every smart phone looks like an iPhone to me, there's no differentiation that regular customers could care about. Self-driving cars seems like a hot new area. Except no car company of any reasonable size is not working on them. There will be no emerging market for these, it will be created fully merged. Robotic assembly lines make it relatively easy and quick to switch on production of just about anything requiring mass quantities. Scaling up is easier with robotics.
I see this as a consequence of global supply chains, subcontracting, and little if any vertical integration. All the little details that used to be trade secrets of a vertically-integrated company are now quite transparent. You open up the device, see who made all the different components, and call them up and ask for a quote. We have come a long way from the days when a company manufactured most of their core products in-house. Just as one example, GE has been subcontracting out the manufacture of steam turbines, to their own competitors, since at least the 1970s. You could argue that they were simply divesting themselves of "mature" technology in order to focus on the more profitable cutting-edge stuff, but I would argue that steam turbine technology only became fully mature because they gave away (licensed) the technology to Hitachi, Toshiba, Doosan, and Ansaldo and let them run with it.