> That's a fairly weak argument: you can browse an electronic document in a non-linear fashion way easier than a book.
How do I make handwritten side notes? How can I create a bookmark for a specific page? How can I view multiple non-contiguous pages next to each other? How can I reference a specific part in an electronic text (in non-electronic text "3rd paragraph on page 11") and send it to a collaborator?
I was specifically addressing the "non-linear" part, and none of the things you list have anything to do with that.
However, to nevertheless address your points:
>How do I make handwritten side notes
There is a number of applications to do this (e.g. xournal), and when combined with a touchscreen on a decent hirez modern device, we're getting close to what paper can do. I'll grant you: this is still the weak point of computers as compared to pen and paper (especially for scribbling diagrams), but it won't be for long.
>How can I create a bookmark for a specific page
I'm not sure if you're trolling here, all e-book readers I've used have this feature.
>How can I view multiple non-contiguous pages next to each other?
Multiple windows ? CTRL+N ?
>How can I reference a specific part in an electronic text (in non-electronic text "3rd paragraph on page 11") and send it to a collaborator?
Cut and paste?
Or ... sending him an email with ""3rd paragraph on page 11"" in the body?
How do I make handwritten side notes? How can I create a bookmark for a specific page? How can I view multiple non-contiguous pages next to each other? How can I reference a specific part in an electronic text (in non-electronic text "3rd paragraph on page 11") and send it to a collaborator?