Sony's new "eink" reader
It's light, portable, the battery lasts, and most importantly, the resolution is the same as print.
Eventually, devices like this will set a new standard for reading that will combine the advantages of digital reading -- hypertext, multimedia, lightness, among others -- with some of (not all) the pleasures of reading print that are so far lacking in reading on or from a laptop or current handheld computer for example.