

Only a little over 10% of Americans have an e-reader and their popularity is declining.
E-ink screens will continue to be niche technology without the advantages of increased development by competing manufacturers.
Way back in the early 2000s cellphones varied greatly. All the designs and models that were available and all pretty distinctive. Today the market is almost exclusively touch screen smart phones; evolutions of the early designs by Apple, HTC, Samsung etc.
Three years later the first iPad was released and that same year Samsung released the Galaxy Tab.
Widespread adoption and competition drives development.


lol
That’s called “lack of demand”