Our friends at Vital MTB recently uncovered a new patent by Specialized for a dropper with an auto-adjusting saddle angle based on seat height.
When the dropper post is extended, the saddle sits level. When slammed, the nose of the saddle would automatically be angled upwards slightly. A level saddle is ideal for climbing, but most downhillers (and dirt jumpers) prefer to angle their seats slightly. This helps improve control and makes it easier to hang off the back and control the bike with the thighs.