From the horse’s mouth
There is some talk about Bluetooth issuing a new major specification that will be tweaked further for the Internet Of Things. There have been some devices that implement Bluetooth 4.0 in this context, primarily in the form of some smart locks, but there are some limitations with operating range for example, especially when these devices work with network bridges to enable cloud-based control and monitoring.
Here they want to pitch it as a competitor to ZIgbee and Z-Wave for “smart-home”, industrial automation and location-based-service applications. The goal with this is to provide an increased operating range (typically 4x the current operating range) and 100% speed improvement but give the devices increased power efficiency. This may allow for operation for a long time like six months on commodity batteries – think of 2 or 3 AA-size or AAA-size Duracells or one coin-size battery of the kind used with watches or car-alarm keyfobs.
Similarly,Bluetooth wants to add “mesh support” where some devices act as radio repeaters for other devices to allow for building-wide coverage. This is something already practised with Zigbee and Z-Wave and could bring about Bluetooth as another option for that smart-home or building-automation system.
But with Bluetooth in the equation, a network bridge for an “Internet Of Things” setup may have to work with Z-Wave, Zigbee and Bluetooth if the goal is to provide an on-ramp to mobile or Internet control. On the other hand, it could be feasible for a device to be designed to work with smartphones and tablets while servicing a building-automation setup, using only one radio transceiver and a well-known data communications standard.