What do I want from my iPad mini? (Yes, I do have a fairly recent one.)
Tighter integration with my phone.
I want to use my phone for making calls, quick checks of mail, maps, etc., the obvious things where a phone size screen is adequate and easier to hold or mount.
But I want to be able to simply open up my iPad mini have immediate access to whatever I was doing on my phone. To transfer an active browser window between the devices. To always use the phone to connect to the internet if the phone is close enough. To exploit GPS in the phone for maps/navigation.
To be sure that apps are always at the same release on both devices.
To be able to use the iPad as a remote on the phone's camera and vice versa.
To allow Passwords, photos, other files, to synchronise between iPad and phone even without an internet connection.
To be able to make a call from my iPad through my phone.
To be able to do almost anything on the iPad via the phone meaning that I do not need a SIM in the iPad (when within range of the phone). Nor do I need the GPS which is only on cellular iPads.
What might be totally impossible, but nonetheless rather nice icing, would be to use a single eSIM which can be active on either device.
In other words, put my phone in my pocket, my iPad in my bag, and use whichever suits from minute to minute.
I know some of these things are achievable right now. Some might be possible with some extra software. I want them to be absolutely standard and built-in.