Since 2016 was such a bad year for Apple in terms of innovation and products.
What do you want Apple to do in 2017 to come back and amaze you?
Stop making thin products that are held together with glue.
Start making devices that actually feel like they're worth the premium they're charging.
Un-flatten the UI, bring back some semblance of depth and important visual cues like buttons (rather than clickable text). Don't need to go back to 10.6.x/iOS 6 styled GUIs, but something that's easier to look at would be nice (less white space, better fonts, etc).
Stop soldering in the RAM and disk drives on all computers (at a minimum). Replaceable batteries would be great for longevity and ultimately the environment, but they're not required.
Bring back a tower machine with PCI-e slots and space for more than 1 disk drive/SSD, or license some other company to make OS X booting workstations instead.
Bring back the XServe, or license some other company to make OS X booting servers instead.
Kill Metal. Announce full backing of OpenGL and Vulkan instead.
Bring back NVIDIA GPU options for all systems (or just dump ATI entirely).
Ditch the yearly release cycle ********. Release products when they're finished and actually warrant a major release. Not before.
Get rid of all the stupid tacked on security **** in OS X like SIP, Gatekeeper path randomization, etc. Ditch that horrible sandbox implementation and build something that covers everything more properly, kinda like SELinux does (yes, I know that's for Linux and not OS X). While you're at it, stop assuming all applications are glorified goddam word processors, and stop purposefully gimping everything that's submitted to the app store.
Allow iTunes account merging.
Allow iOS downgrading. Since each successive iOS version typically slows down older devices, it should be up to the user if they want to accept responsibility for running an older OS if that's what runs best on their device.
-SC