I find laptops (let alone phones) fairly unpleasant for anything resembling a comic. You really need a 4k monitor at least the size of a physical page. That usually implies portrait orientation, and then a second one for spreads, at which point just give up and use a large format tv. Or better yet just stick to paper.

I also have this problem with the scientific literature. Tablets let alone ereaders just don't cut it.

What I've long wished for but it doesn't seem to exist is a high resolution full color epaper tablet the size of a hardcover textbook page with a sub-second refresh time. Not live video or anything, 500 ms or so would be bearable for quickly panning around a document.