The Block, Cylinder, Sphere, and Cone commands are now associative to their respective point, vector, and curve positioning objects.
If you subsequently move one of the positioning objects, the feature updates associatively.
Why should I use it?
This new associativity makes primitive features more useful for modeling prismatic objects such as machining fixtures.
Where do I find it?
Menu Insert-->Design Feature-->Block/Cylinder/Sphere/Cone