Smart Dust.
This is from one of those super high tech thinkers.
"In ten years' time, every piece of clothing you own, every piece of jewelry, and every thing you carry with you will be measuring, weighing and calculating. In ten years, the world — your world — will be full of sensors. The end point of this evolution is already clear: it's called smart dust. General purpose computing, sensors, and wireless networking, all bundled up in millimeter-scale sensor motes drifting in the air currents, flecks of computing power, settling on your skin, ingested, will bemonitoring you inside and out, sensing and reporting — both for you and about you. "
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Scared yet?
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Pilot