Why the iPad is a potentially groundbreaking platform, despite the accusations of being 'only a large iPhone'.
Just read this old piece written in 2003 by a (very smart) tech blogger; it's about user interface defects as heritage of early computer hardware limitations, such as the presence of save and quit commands.
Step back to 2010, and guess what is the only computing platform that does not have any save and quit commands ? Correct, it's the iPad.