I'm not sure what to make of this, Neo. Research Councils UK are reporting that policymakers and planners may soon have access to real-time, real-world data for the United Kingdom's entire population.
The "grid computing" project e-Science seeks to integrate data currently tracked by disparate agencies, allowing researchers to cross-tabulate virtually any ("anonymous") data in the UK. Projected benefits include the ability to track (and forecast) health, employment, car ownership, et al.
Potential drawbacks, anyone?