I was interviewed for this article though not mentioned in it. My use case isn't mentioned: unaffiliated researchers with limited access to journals doing our own exploration of areas. I've compiled a library of several thousand articles (and via other sources, books) which for both access and portability I prefer electronic versions. My 10" tablet is almost perfect for reading printed material, and functions as a sm…
Just as an aside, you could try Zotero - I use it on my laptop and phone and it works pretty well for me. There is a dedicated app as well. https://www.zotero.org/
My understanding is that it's more a _bibliographic management_ tool.
There's also Calibre, which seems like it's a close solution, though that too is problematic, particularly at scale.
Another problem is that my laptop (as opposed to tablet) isn't particularly useful for reading formatted documents -- PDFs can't really be viewed _either_ one-up or two-up, and FBReader, which I like on mobile, formats ePub and similar eBook formats poorly (too wide, insufficient paragraph separation, unfamiliar controls), which is frustrating as well.
The tablet's much superior for _reading_ but even worse for _organising_ material.