There's no harm if everything is working ok for you, it's just the 4.4.4 update more then likely, but I think as some point you can't postpone it anymore. The update will download and install on it's own after so long; the AT&T website says you can postpone the update up to 3 times, and 4 hours per occurrence. After the update has been postponed for the maximum allowable time, your device will automatically download and install the update.
Not sure if that's true since I always just do the update.