Kobo finally got their act together and moved their manufacturing back to Taiwan and started releasing neat devices including a new a 10 inch note taking devices.
Some of the old manufacturers like Supernote have now become OEMs. There are eink phones, eink mobile readers, remarkable and even the new upcoming pine reader, which looks like a bigme device with custom board.
2021: https://goodereader.com/blog/e-book-news/demand-for-ebooks-o...
2018: https://observer.com/2018/11/ebook-sales-decline-independent...
And I'd say that all the devices coming out now do not have the name recognition of Nooks or the PRST1, let alone the Kindle. At least in the US market; things might be different in Asia.
In India, physical books have always been a lot more popular (and still are) since books are a lot cheaper than in the US (printed on very crappy paper though). But that's also meant that there's a lot more room for ebooks to grow into. The US might be, what, a 30-35% ebooks share at this point? In India, its less than 5% but growing very strongly.
BUT this is not accompanied by ereader sales. Majority of ebooks are read by folks on their phones. (I suspect China has been seeing something similar too with the proliferation of online reading platforms.)