All these features will be useful provided they function as advertised. Also hopefully Apple will be able to launch it without any delay on the 1st day of iOS 27 launch itself.
That was exactly my idea. How useless will it be outside US? We have apps that scan barcode to give you nutrient info and much more. So if Apple implement it the way you can choose app that it will launch then kudos to them but otherwise it is just American gimmick.
There's an app called Nutrients that lets you scan the barcodes of foods/drinks, and uses the open food facts database (or manual entry) to add to your food journal. Not as glamorous as AI but it works well.