I think the divide here's largely along the lines of what people read. E-readers are king for light fiction or airport nonfic, for instance, but pretty awful fo

I think the divide here's largely along the lines of what people read. E-readers are king for light fiction or airport nonfic, for instance, but pretty awful for heavy nonfiction reading (think: textbooks), with everything else falling somewhere in between—poetry: somewhat bad on ereaders but maybe tolerable, depending on what it is; good, older literature, depends on how much you want/need footnotes or to refer to other parts of the book, and how inclined you are to annotate; books of any kind used for actual research, you probably want several open at once and a bunch more with tons of bookmarks in them that you can have open to a certain spot (you remember which one with spatial memory and maybe bookmark color) in a few seconds, which gets dicey with e-readers, even if you have more than one; and so on. Tablets are better in some ways than e-readers but much worse in others. There's no killer does-everything-pretty-well e-reader solution yet. They rock for casual, lighter reading, though, which is probably a fairly high percentage of all book reading that happens.