The overhead and maintenance involved in setting up these home automations have always seemed to spend more time than it saves. I'm not convinced that automatic lighting is better than just flipping a light switch.
Beyond the "cool" factor I'm with you. I don't know what the benefits would be but I can definitely see it being a pain to maintain and the extra cost in both time and money for running these automation do not seem worth it. I would definitely like to be proven wrong, but I have not seen anything to date.