Read it again. They're talking about using a clickwheel with numbers around the periphery as a replacement for the standard cell phone numeric keypad. Apparently Samsung had done that (news to me) and Steve thought they screwed up by not having the numbers 3, 6 and 9 match their positions on a clock.
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.