Zigbee IS the standard for Home Automation
Vertical markets are certainly a focus of Zigbee deployments, that's because the device interoperabilty is based around profiles for specific application areas like Home Automation. But it's largest deployments are in Homes and Hospitality.
Zigbee has a much larger installed base than Z-wave and is available from a much wider range of chip vendors and manufacturers than Z-wave. Most of Z-wave's products were discontinued when intermatic pulled out of the z-wave chip and product business last year.
Control4 already has over 1 million zigbee devices shipped for the home and just finished installing over 90,000 zigbee devices in the new Las Vegas City Center.
The new interface standard for televisions IS Zigbee which is the core of RF4CE's replacement of IR for RF comms. It's already being used in the upper end Samsung TV's as IR is being discontinued.
I'd imagine that the delay for Zigbee in a SIM was due in part to the delay in the ratification of the ZigbeePro standards which were finally put in place last year.
Zigbee for HVAC has been available for over 4 years. Take a look at the Tstats from Control4, Ecobee, Crestron, AMX, etc.