Teknologia 2015 fair in Helsinki Finland had lots of IoT products presentes.
Here Texas Instruments presented new version of SensorTag and similar tag with WiFi connectivity. The demo had BeagleBone Black card with a shield that connect to Zigbee and Bluetooth radios. The logic from sensors to outputs was programmed with Node-RED.
Clearly Node-RED is a tool for wiring together hardware devices, APIs and online services in new and interesting ways. I have to test it some day myself.