The newest update will be soon. Humminbird held up the 5.840 version for the 898, 998, and 1198 to add some additional upgrades.
5.840 is the issue that adds the new Waypoint Mangement to the unit.
If you haven't seen the announcement, the 898 and 998 will have a change of the data boxes on the left side of the SI view so you can have full screen width.
Stay tuned, you will like the lastest stuff.