This article by Mickey McManus describes a future where devices and things will orchestrate amongst themselves in order to deliver useful (and potentially life-saving) functionality to we the humans.
McManus uses the analogy of a jazz ensemble to describe what he calls the 'Community of Things':
It's like a well-coordinated band that practices to perform intricately detailed music. If the Community of Things progresses like a carefully assembled jazz ensemble--all perfectly in tune and tuned in--these connected things will collaborate, improve themselves, and even save lives.
He makes it real with a scenario:
A young boy runs into the street. This time, all of the "Things" around him come alive like a jazz ensemble improvising a song. The stoplight at the end of the block turns red. The car speeding toward the child warns its distracted driver and slows down. A sensor in a street sign sends a message to another sensor farther down the road. Spikes deploy from the roadway and bring the car to a dead stop, seconds before the child could be hit.
Hmm, as laudable as the use case, the recent hack of a Jeep Cherokee highlights the risk of a car's driving systems (brakes, steering, transmission system, etc.) being accessible by remote applications (whether well-meaning or not).
More prosaic than saving the life of child chasing a ball into the street is the potential for that same ensemble of devices 'composing' identity assertions about humans (e.g., my watch validating it is me by my heartbeat, my TV asserting that somebody is in the room, and my phone validating my fingerprint). All these combine into an assertion that the person trying to access some resource is indeed me.
Instead of authentication being a discrete and explicit operation (as is the current reality), users will be continuously authenticated through a combination of passive factors - and face an explicit 'login' only when the assurance from the passive factors is insufficient for some operation.
Jazz, with its improvisation and free-form style, may be inappropriately loose for this sort of authentication music - perhaps chamber music is a better fit. I'm falling asleep already.