Wireless Control and Monitoring Systems

It occurs to me that the exploding unlicensed wireless(WiFi, et al)technologies, applications and open system opportunities, ZigBee being one group pushing this notion, will make us extremely dependent on uninterruptible electricity supplies. Will this mean that we will need local generation capabilities as primary sources or backup to the power grid? If so, a new industry will expand rapidly, that of local generation, including fuel cells. Seems to me an investment opportunity looms.