Did you ever ask yourself what would be the perfect form factor of your favorite mobile device? Russ did some nice drawings
depicting how form factor varies among popular mobile devices today.
We've converged just about everything we can converge into a single device (computers, gameboy, audio, video, GPS, etc.). Now they're just going to get better and more usable and "more converged."
Having read Russ's insightful thoughts, I came to one conclusion: there will never be a converged device that could offer all the benefits of mobility such as currently offered by individual dedicated devices.