At the introduction of the iPhone, Steve Jobs touted that new device as a "Widescreen iPod", "Revolutionary Mobile Phone" and "Breakthrough Internet Communications Device".
I believe the same type of convergence thinking is going into the tablet. It can't just be a "Kindle-killer" eBook reader. It can't just be a "Media Pad". It can't be a Nintendo DS or PSP competitor. It can't just be a small NetBook-sized MacBook either. It has to be all of these things. At the same time.
