According to Sprint support, owners of the Samsung Galaxy Note 4 on its network should begin receiving the update to Android 5.0 Lollipop as early as today. The update will rollout as build N910PVPU1BOB7.
Sprint doesn’t say much in terms of new features or what you can expect, but I would imagine it will be the same Lollipop-TouchWiz experience seen on the Galaxy S5 and Galaxy Note 3. We went hands-on with Android 5.0 for the Galaxy S5, so you may want to check out that video to familiarize yourself.
Let us know if you get it!