Those are still around but they're kind of a gimmicky thing that you only try once before realizing that they suck.

Japan figured out the best version of these with conveyor belt sushi. But in most of those restaurants you can see the sushi chefs and there's still waitstaff for drinks, so it's like they made it as un-alienating as possible.

edit: actually I just realized that Ghost Kitchens are the current cutting edge of the automat concept. Just a kitchen in an unmarked building that you (more likely your delivery driver) pick up food from.