Wired looks into the future by investigating the huge efforts of Google, Microsoft et al to create huge datacenters.
"The next wave of innovation will compress today's parallel solutions in an evolutionary convergence of electronics and optics: 3-D and even holographic memory cells; lasers inscribed on the tops of chips, replacing copper pins with streams of photons; and all-optical networks in which thousands of colors of light travel along a single fiber. As these advances find their way into an increasing variety of devices, the petascale computer will shrink from a dinosaur to a teleputer – the successor to today's handhelds – in your ear or in your signal path. It will access a variety of searchers and servers, enabling participation in metaverses beyond the ken of even Ray Kurzweil's prophetic imagination. Moreover, it will link to trillions of sensors around the globe, giving it a constant knowledge of the physical state of the world, from traffic conditions to the workings of your own biomachine."