I understand some people are not morning people (my own DD), but so little time is spent together as families anymore so I emphasize electronic free meals at my house, and while I don't think it is for everyone, I would have raised my eyebrows at the scene OP saw. I see it a a lot and to me, it is so sad when a family can't turn things off for an hour to have a meal together. But I would never say anything, the thoughts would stay firmly in my own head.
You're free to have those thoughts--but you are making an awful lot of assumptions.
You are assuming that there is 'so little time' to spend together. You assume they 'cant turn things off for an hour'.
Heck, it's assumptive to even state that 4 people who are having breakfast together are a family--for all I know, it could be the chauffeur and 3 family members or 2 adults hired to chaperone minors to an airport.
It could be that the whole crew is traveling home from a funeral and are emotionally exhausted and need to escape.
It could be that the male adult speaks a different language.
It could be that being 'absent' from the family for an hour via electronics frees all of these people up to be 'present' from the family for the rest of the day.
If it's 4 people is it my style? no, not really. But it's not hurting anyone outside the family, so it's nobody's business.