In the 20 years since the first laptops with built-in Wi-Fi were introduced, the idea of totally wireless but completely connected personal devices has become commonplace. Today, many laptops don’t even have wired networking ports. Most IoT devices use Wi-Fi to communicate. Every smartphone has a Wi-Fi radio.
Wi-Fi is so pervasive that by 2022, there will be 8 billion personal mobile devices, just about 1 per every human on the planet. Some reports say there will be 50 billion IoT devices on top of that.
