Especially since they haven't implemented all the features that would make them handier than books:
a) Copying excerpts (most DRM readers either forbid this or make it a time consuming BS process)
b) Adding notes (ditto)
d) Easy access to all your bookmarks and notes across your whole book collection.
e) Proper, book quality typography and layout (not markup BS that looks like a webpage), with overrides/re-layouts for larger font-size etc only as an additional option not as the main way to read.
d)
Ebooks make it easy to read anywhere and anytime you have spare time without lugging physical books around
"Oh this random place I happen to be is a perfect place to read, if only I had my library with me to pick a book".
If people know they'll be traveling, they pack a few books to have with them (or buy at the airport). If they're commuting (e.g. to work on a train or long bus ride) then they bring along the book they are reading at that point in time. But usually they just read at their house/study/office.
As for casual reading, there's always tons of stuff on the web.
For me, ebooks make it possible to replace much of the casual reading I do on the web with books. I've been happy with the change and I read significantly more books.
Since moving to ebooks my book consumption has increased 4x. I've replaced random phone scrolling during downtimes with books and it has been fantastic.
I'm to the point now where I actually prefer reading books on my phone even when a larger display device is nearby.
ebooks make it easier to turn this around. Digital media is reliable, easy to transport and distribute.
I don't want piles of dead trees with outdated information taking up space.
Plus with ebooks I find right away the information I am looking for.
For other types of books, yes paper rules.
I agree with the ease of use of the paper version though.