Call me paranoid, but I want my "wireless wallet" to require me to confirm the charge in some fashion. Otherwise I see "wireless pick-pockets" and similar scams arising. A cell phone already includes a keypad and display, so it could show the charge amount and you then confirm (or even enter a PIN) via the keypad. But that would have to be separate from my service provider, otherwise they would charge for purchases just like they now charge for texting and everything else.
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.