Earlier quoted context omitted.
Even if there's no scientific research, e-ink doesn't seem a gimmick to me. I find it a pain to read on a laptop, but find a kindle almost as good as a real book. My eyes simply tire a lot faster with an LCD.
As I said, laptops don't have the e-ink resolution. And depending on what you read, it might not even have the same contrast. So, unless you adjust the brightness and contrast appropriately and have a hi-DPI laptop, e-ink will come on top for reading. There's also the convenience in holding the reader vs using the laptop to read. So cannot really compare it to a common laptop. To actually compare like to like, compar…
Agreed about the ergonomics: it's more comfortable to hold a kindle than a laptop. However, I'm not sure I could replicate the experience with a tablet: I'd have to lower brightness a lot, increase contrast, and shine a light on it, at which point LCDs stop being comfortable to read.