Parker and Stephen do a really bad job explaining what MacroFab does. MacroFab does end-to-end electronics manufacturing and operations for low volume companies. Everything can be done via API end point which can enable your webstore to automatically drop ship inventory to your customers.
The ESP32 wifi module has been released. It is the successor to the popular ESP8266. If the price for the modules drop then the ESP32 will probably be as successful as the ESP8266.
Stephen and Chris gotta go fast with SPI over I2C.
Power will be the limiting factor going forward for IoT and other small devices as chips like the ESP32 drive the price of silicon down.