Well, yes. The books on my bookshelves - I own those. Nobody can take them away from me without burglarizing my house. Ebooks, on the other hand, belong to whichever giant corporation provides the reader, and if that reader has any whisper of network connectivity then my "ownership" of those books is subject to whatever pressures might motivate that corporation to revoke my access. It is not the same thing at all. I don't care how much better ebooks are supposed to be, if I have to deal with some megacorp to read then it is not a solution for me.