Here's some information I've gathered so far:
In a video I saw, the Ram representative said they raised the front of the truck 5mm. This would match what some fellow forum members have stated that the truck is taller to climb into than past years.
In another video I saw the Ram representative said the front axle housing is completely redesigned to reduce road vibration (and features a new pinion seal). So the question is, did they get the extra height from taller springs, or revised perch height?
If the springs are taller, then a 4th gen lift kit that utilizes aftermarket springs won't give us the advertised amount of lift.