Either Tim Cook's double down system is finally working or something else why there hasn't been much of a hint as what to really expect; except for 10.13 systems checking macrumors.com. With exception since 10.10, there hasn't been any major changes. Addition of Siri to Sierra is debatable, but it seemed more logical. We already know APFS is definitely a huge under the hood upgrade for macOS platform, but its not as sexy as user facing features. Is it possible something else in relations to APFS could lead to some substantial user interface or application features and functionality? Then again, the direction of macOS seems to be refinements going forward. Going back to APFS, are there some core areas of the system likely to see substantial improvements? Here are some things that come mind: Time Machine Backups - Faster, secure, more flexible. Better performance on SSD drives - meaning, even faster startup times, application load times - debatable, because I haven't seen it on my iPhone. Enhanced security - better encryption options for local and external storage - not really an OMG kinda thing. Virtualization - could likely mean a dual file system approach similar ChromeOS. No need to reboot anymore when applying point updates. Basically, you install 10.13.1 and it switches over to the new one without you noticing. This would be substantial productivity booster. Virtualized Boot Camp, meaning, you could now run Windows 10 natively in macOS without taking a performance hit and get all the benefits of direct access to hardware: memory, GPU, processor cores. Native read and write to NTFS drives - would really make interoperability with Windows platform easier. This one just popped up in my head, but its possible there could be a merger with iOS and macOS. Not just at the file system level, but in a more substantial way in regards to maybe API's and Graphical User Interface. Meaning, iOS and macOS both die to form AppleOS powering iPhone, iPads and Macs. The operating system will be be intelligent enough to provide the best features and experience across devices, optimized with functionality to make users more productive. Yes, this means Apple would be introducing a new platform with a major name change again. But, Apple has been known for surprises. These are just some of things I can think of. Its a desktop operating system after all, but the fact that Apple has kept a lid on leaks suggest there must be something major coming.