This shows that there is room for a well designed, easy menu app. No ordering, no separate app installs, no mandatory accounts for the end-customer, no PDF menus.
Native app clip / instant app is a also a good use case for this if you really want to develop more than just a good mobile site. Add the ability for the owner to quickly make changes to the menu (dish of the day?) and it should be better than what we have right now.
Of course only if you have decent internet coverage at the place.