Analysts have been predicting Zigbee to take the automation (home and industrial) world by storm for nearly 4 years now. I think it may be failing because it has a hard time dealing with RF interference - it's a low power DSSS radio in a world of high power WiFi and FHSS radios.
Hopefully the next-gen wireless standards like ISA-SP100 will make this a reality.
Hopefully the next-gen wireless standards like ISA-SP100 will make this a reality.