ebooks as a platform will never evolve until ereaders (like these) get ~30FPS refresh rates. That's when "scrollytelling" can enter the race and could very well expand the industry into new territory.
It flopped. It turns out interactive infographics and scrollytelling are fun (and costly) to make but readers don't really like them.
The smashing success story wasn't actually what you can do with the new devices' screen, it was audio. It turns out audiobooks (and podcasts) are a huge hit when the price is right and you make it accessible enough.