ECC is a really required feature of processor, and if the memory itself can find and correct it will really off load the work load of processor, this way it will be really a speed boosting feature for an embedded system, one can read this article for further reading,
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.