I've done tons of 3d lenticular DVD covers, from the "Independence Day" cover to "IronMan", "Starship Troopers 3", to close to a hundred currently available in the Disney Movie Club.
It is SO great to see 3d movies taking off and what a great way to showcase your 3d movie than a lenticular DVD/BlueRay cover. It's a perfect fit. Not only does it give your movie a perceived added value due to the special cover (And more collectable!), but it also makes it more difficult to counterfeit. You would know that if it doesn't have the special 3d cover it's a bootleg.
Check this out:
http://lenticularblog.rrd.com/bid/8027/Lenticular-DVD-Covers