Musings – What do you think of the rise of digital copies of books (Nook, Kindle, Google Books)

I believe its a interesting concept, however I still have my mis-givings about it. I am abnormal for a IT worker that I am not a early adopter of technology I still have a DVD player, a cell phone that does number but dial and receive calls and a PS2. My main concern is with a digital copy you have purchased a good you do not wholly know (one of the major reasons I do not use iTunes). I am a full believer in if I purchase a item then that item is mine to do with as I please (with the exception of making copies to sell). With E-readers like the Nook and Kindle the books you purchase are on the companies servers and not in your hands.