We've seen emergence of cloud kitchens recently, specifically thinking of companies like Rebel Foods, but even in the few images that Rebel Foods publishes, it doesn't look like the typical factory streamlined process. This video is one of the few things I could find, and even then I had to go out of my way to find it. Developments like these would really strengthen the working class by dropping the value of food.
Fast food & microwave dinners are a form of industrialized kitchens but not the only one it can take. You can also have centralized factories that produce thousands of boxed lunches per day. Japan does this with ekiben for example.
Cooking is a part of domestic labor. It takes up free time out of work, it's unpaid, its workers tend to be women, and it's individual instead of socialized labor. Everyone ought to be able to cook for themselves if they want, but automation and collectivization of cooking (and the domestic sector in general) is desirable.
Is this not the same as microwave dinners and sandwiches at gas stations but with a Japanese accent
Agreed, but it'll be probably just be restaurants and cafeteria style imo instead of industrialized food at the scale of OP's video
No it's not. Microwave dinners are frozen, whereas these are refrigerated meals.