Agree with Tessa below that using a phone and switching between the method and ingredients tab whilst cooking can get a little messy and fiddly.
Printing recipes at home and sticking in a document wallet folder is an ok option, but this is the future and I’m imagining a customisable lollipop cookbook. Perhaps in the form of a blank hardback with empty pages and then the recipes come in the form of stickers. Being able to customise the front page and pictures in the book with my own photos would be awesome too (like Photobox).
I’d go further again and want this cookbook to be THE family cookbook, and so having the ability to add custom homemade recipes or convert recipes from other cookbooks would be a fantastic feature. Another linked new feature related to this would be an AI that allows me to take a photo of any cookbook page, have the text digitised and ingredients matched automatically to Sainsbury’s.