Alexa team works with a group that has created Amazon Echo smart speakers on the project. There is supposedly a beta test, although it's unclear whether it's hardware, software that would detect emotions, or both. Eventually it could prove to be an experiment and never see the light of day on Amazon's front.
The company has described in detail the system in the 2017 patent, which uses voice pattern analysis to determine someone's emotional state that could then be used to customize designs as needed (for example, chicken soup if you smell when you say Alexa is hungry). The wrist is said to use this technology as well as a system that separates one's voice from background noise.
It's one of a number of hardware projects Amazon is supposed to be working on, extending its extensive product line, filled with Alexa. Last month's reports said they were developing AirPod-style wireless plugs with a built-in voice assistant. However, it remains to be seen whether people would accept a device to monitor our mood. The retail giant has confirmed that employees are listening to some of Alex's records to help improve their assistant.