I have no particular fixation on the e-ink technology. If some new technolgy like an improved mirasol came along that gave me all the advantages of e-ink plus extra advantages I would make the change.
It's like a car. I really don't care what what's under the hood is called as long as the car does what I need it to do. All technology is transitional.
If you mean every one who is using an e-ink device will in the future be using a lcd tablet instead that seems unlikely.