I remember buying an HP iPAQ in Hong Kong back in 2003. An amazing little device, hampered by a clunky Windows OS. It was pretty, clean looking, almost elegant. About the size of an iPhone. As I wandered back to my office in the lunchtime heat,  I did not realise it, but HP had been developing the PDA concept for a considerable period of time. It could have become an iconic product, it had the potential. I still have it in my personal museum of...