Use Cases of Emotional Machine Learning
There might be a number of great use cases for an algorithm that is able to detect a human's emotional state. For example, Facebook could improve it's Newsfeed if it had access to a user's emotional state and professors could setup a camera in class, if analysis of the data reveals that on average the class was confused then, a revision class could be setup for the concerning topic -- the same could be setup for distance learning.
Will users adopt such a technology? The Facebook example would be controversial. Having said that, I wonder how many users are already sharing their image with a device through Android's "Smart Stay" function. The classroom example seems like an instant success.