A specific-purpose accessory can't be as big or as revolutionary as Apple ][e, Mac, iPhone or iPad.
More like apple TV, iPod, console, kindle. Still scope for a multi-billion dollar market though.
Just the kind of thing Sony might have made in its heyday, and Apple can dramatically improve it iteratively, limited only by the wrist-space form-factor. Replace your wallet (payments, ID, memberships), car keys, TV remote; monitor blood sugar, home-automation etc.
More like apple TV, iPod, console, kindle. Still scope for a multi-billion dollar market though.
Just the kind of thing Sony might have made in its heyday, and Apple can dramatically improve it iteratively, limited only by the wrist-space form-factor. Replace your wallet (payments, ID, memberships), car keys, TV remote; monitor blood sugar, home-automation etc.