Curious if anyone has an elder parent who often, instead of conversing, points out people, places and things? Like on a car ride, in house.

Your profile says Dad is suffering from a Dementia. This is part of the disease. Its like a small child. They aren't really looking for you to answer them. I just let my Mom go. There minds are just all over the place. Even if they ask a question, they probably forget what they have said within a second.

This sounds like cognitive change more to me, if the mouth is narrating what the eye sees in the way you say. Normal would be "I had a bike just like that" or "Kid is sure good on that bike" or "Bikes in traffic always scare me; I am afraid I will miss seeing the rider and there will be an accident". What you are hearing is different than that. Are there other symptoms that are getting worriesome? Would the person accept a baseline exam with neuro team suggested by the doctors?

It's called a broken brain... Acknowledge your Dad's words then distract. What may also help you to deal with this is to watch Teepa Snow's you tube videos.

...or the beginnings of cognitive change. My aunt did the same thing. It preceded her dementia diagnosis. Has your father ever had a cognitive test by his doctor? It may not show anything if your father's memory is still good, but your dad is apparently becoming less and less aware of what is socially appropriate behavior and of what is coming out of his mouth. Lately I've noticed that my mom will continue talking even when everyone has stopped and is looking right at her -- social/facial cues not registering. If I point out she needs to stop talking for a bit she gets flustered, then a little angry. If I ask her to please stop talking about politics it's as if I've said please keep talking about politics. We eat dinner with her every night so we can only take so much. Take your dad to a gerontologist or geriatric doctor (they specialize in the elder), or even a neurologist for a thorough exam so you know what you're dealing with and can treat it properly (if necessary). I wish you all the best in helping your dad.