No. My point is that many people, in the 24th century or any other, even given the capability and option to use this kind of communication, might nevertheless choose not to, because they might find it distracting or unpleasant, as it's implied that Sanders does there. It's the same reasoning I would suggest to explain why people on TNG weren't using their hands to manipulate and fling around the images on the holo-consoles there, but were instead using the tactile interface. They might simply find it more comfortable and prefer to do it that way. It doesn't have to mean the device itself is inferior in its capabilities to what we see in DSC.So your way of rationalizing not having holo-technology regularly in the future is to turn Sander's into Sisko's adversary as not being an invited person on his ship?
I personally don't enjoy the experience of 3D movies and prefer to stick to 2D even where there is a choice. The 3D aspect usually doesn't add much for me. I find it difficult to focus on the story and I usually end up with a headache. (Not to mention the expense!) Also, not all theaters are equipped for 3D, and not all movies are released that way, though it's more common now than ever before—after falling in and out of popular favor more than once over time. Similarly, as @fireproof78 said before, I don't like talk to people via video or speakerphone. I prefer to just hold the phone up to my ear. Always, with only the rarest of exceptions. This doesn't mean the phone can't do those other things though. I just don't use those features, out of my own preference.
It's entirely possible that Kirk and others felt the same way about holo-communicators. It could have even become a common sentiment at various times, even if it isn't in DSC's.
First of all, I don't believe we are meant to think the holograms on DSC are solid based on Sarek "sitting down." I think it's fairly clear he actually sat down in the room where he physically was, and the computer "cheated" this effect by abruptly shifting the projection to another part of the room that roughly corresponded to the object he was leaning against so that it wouldn't look like he was hanging in mid-air taking a dump. You may notice that his image jumps from one spot to another to make this happen. In other scenes, we see Anderson's holo-projection pass right through objects.I would say Discovery improved on the design of the new holo-communicator installed in episode "for the uniform". The Sarek hologram was able to walk around the room and sit down whereas the holographic image show in episode "for the uniform" was restricted to a small area that was visibly lit up on the bottom.
The projection in "For The Uniform" looks to be solid, as most 24th century holograms are, which the contained area might have something to do with. Even if it isn't necessary to maintain the forcefields involved, you wouldn't want a holo-Eddington able to run amok around your bridge sabotaging stuff, now would you! On the other hand, the one in "Doctor Bashir, I Presume" looks like it might be more akin to the DSC ones, projected from above, and with no containment ring. And possibly even not solid, so maybe not new at all, but actually quite old.
-MMoM

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