The three major players for this market in no particular order are:
ARM with Mali graphics IP.
Each have their particular strengths and weaknesses across technical and business characteristics. Through various corporate and advisory roles in the Android / consumer space I've seen them all.
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.