Does Zigbee Trump WiFi mesh?

According to market research company, In-Stat, the ZigBee standard will become the dominant wireless mesh networking technology because of "the clarity of the ZigBee standard, the organisational strength of the ZigBee Alliance and the involvement of several of the world's largest semiconductor companies." In-Stat doesn't explain how it reaches its conclusion in light of ZigBee's much more limited bandwidth than WiFi: a maximum off 250bkps, according to the ZigBee Alliance, as against 10Mbps and above for WiFi.