This is subjective and not monetary value. The only people that care about social, decorative, and nostalgic value of books are also the people who probably wont resell books.

> works without power

finding a place to charge your device is easy and ereaders last months without recharging

> easy to share, resell

Sure but the money you save by reselling a book is probably less than what you save by buying the ebook

Space and weight are real, expensive costs. Owning a library has negative monetary value. Owning a library of ebooks doesn't. It's stored on the internet and you can access it from anywhere.

Basically, if your books aren't furniture and you aren't sharing your books multiple times a month ebooks provide more value.