Analyst coverage summarized by Good e-Reader projects the global e-paper market reaching roughly $8.6 billion by 2026 - driven not only by e-readers and digital notebooks but also signage, wearables, and other low-power displays that reuse the same supply chain.
For book people, the headline is indirect: more investment in e-ink usually means better panels and faster iteration, even if most units sold aren't Kindles. It also explains why every gadget blog suddenly cares about "paper-like" tablets.
(Shortened and summarised to avoid devaluing the source)