Stephen Dukker believes he has what the world is looking for: The People’s PC. But it’s not really a PC. The chairman and chief executive of NComputing in Redwood City, Calif., is pursuing a computer revolution with a small box that turns low-cost desktop computers into servers that feed dozens of work stations. In tech parlance, it’s called “thin client” technology — devices that have no processing power and store information on servers. NComputing’s virtualization software taps into unused capacity in high-performance PCs and disperses that power to up to 30 other terminals.