At home, my current (and growing), physical book collection consumes the equivalent of four Ikea Billy bookcases, total cost for storage: ~£200 (excluding fuel for the 5 hour round trip to the nearest Ikea).

A £111 Kindle can store up to 3,500 books. To store that many on shelves I'd need just over 21 book cases, totalling just over £1,000 (excluding the cost of a larger home to accommodate them).

How about another...
I can go on vacation with my entire book library electronically. I do not have to concern myself with selecting (and potentially regretting) the one or two physical books I decide to take away for a week. 

I see these as genuine, distinct, added-value benefits of ebooks over printed books.

There's no doubt that ebooks do not offer the same set of values that physical books do - memories, experiences, tactile qualities, etc. - but, just like every other aspect of the digital world, they offer a whole new selection of values, many not previously conceived by even the creators until they are out in the wild, evolving in their own spaces. 

What I believe we must strive to do is to stop comparing ebooks with physical books and treat them as an alternative in themselves, not a replacement.