Just to make a point, some of the aforementioned people are absolutely unaware of their surroundings, won't acknowledge the waiter's existence, nor have an eye

Just to make a point, some of the aforementioned people are absolutely unaware of their surroundings, won't acknowledge the waiter's existence, nor have an eye contact with them, while they are on their phone. Immersive experience, that is. (note that I understand your point, just want to be sarcastic and bitter when I think about phone / AR-VR and other social media addicted people, who are eventually going to be the target audience of any of these new time wasters)