4 years on and ZigBee still does not appear to be anywhere near Z-Wave in the number of products available for Home Automation.
http://www.smartofthehome.com/2014/03/zigbee-vs-z-wave/
A couple of ?high profile? products such as Philips Hue have lifted ZigBee into the spotlight (and there is the Nest thermostat and smoke detectors which apparently host dormant ZigBee chips), but if ZigBee intends to complete with Z-Wave I think it needs to flood the market with more devices which are guaranteed to work with each other. Alternatively it may turn out that the pair co-exist with Z-Wave taking the Home Automation corner and ZigBee the Smart Energy corner.