Great article that reflects the changes in the industry towards WSNs and new applications - the part that is missing in my opinion is the Energy Harvesting part!
New low power designs have open a wide door to EH solutions (wasn't realistic couple of years ago due to power budget)..these solutions, are been adopted by leading WS companies to resolve the battery limitations..
As for today, you can find multiple applications running on Solar, Vibration and Thermal harvesters connected to a supercap or rechargeable battery..
Zack Sharon, Sales & Marketing Director @Sol-Chip
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.