Hitch and eschwartz. As happens regularly, I find myself in agreement with both of you. So-called "real" page numbers are meaningless. In an epub or mobi type ebook where the reader has some control over attributes like the font size, page numbers are arbitrary and just one of any number of means of giving the reader some idea of their progress. As DiapDealer pointed out, there is no need for this to even be visible at all times, though preferences will vary.
The other and more essential purpose served by page numbers was for purposes of reference, citation etc. In EBooks page numbers are once again less than ideal. The problem is not new or unique. In common law legal systems where case law precedents are important citations were traditionally to pages of published law reports, sometimes to a passage as small as a paragraph. When such case law took to the net this became ridiculous and unworkable. This Wikipedia article discusses the various solutions adopted, some themselves far from ideal.
https://en.wikipedia.org/wiki/Case_c...utral_citation It may be that we do need some format neutral citation standard for all books. If so, I will leave it for those more informed than myself as to what the best standard may be.