This quickly becomes creepy beyond my wildest imaginations. Kill it with fire, please.
It's true with all new tech these days, and I'd be doubly worried when it comes to things like emotion detection. There are no good uses with strong business cases, but plenty of nefarious ones.
Reality: "We'll use it to store media encryption keys, so hollywood will let us stream media to your device."
I do not even carry a smartphone anymore and am happier for it.
A totally closed hardware & software combination tethered to a corporate cloud ? NO WAY IN HELL!!
You'd also have to never talk to another person with them, since other people are capable of manipulating your emotional state and can't be audited.