Philip Greenspun, an MIT professor and the former founder of the now defunct Ars Digita, has a proposal that he is going to present at Xerox PARC for making the mobile phone the centre of a user's computing environment. I think that cell phones will absolutely become most people's primary computing devices. Greenspun's plan for making this a reality with today's hardware and software seems like a good one. This is very similar to the Why Cell Phones Will Dominate the Future Internet paper I posted a long time ago.