Dear X-Air, Blick, Weatheraardvark, Herb, Steve, and WeatherCat admirers of Steve Jobs,
Okay, I saw the video last night with my Mom and we both were very deeply disappointed. For starters, Apple continues to steal features found in 3rd party utilities and calling them their own. That will only further poison the relationship between Apple and its developers. If Apple likes something developed by another developer, the developer should get some compensation for being put out of business (which very frequently happens.)
Worse still, when Apple steals these ideas, usually they aren't as well implemented as the original. Apple's updates to the Finder are a very pale imitation of Path Finder. You already can share your clipboard between your Mac and iOS devices. There are better third party tools for you to search for old files and make better use of your disk space.
I didn't see a single feature that I would want that isn't already implemented better by existing 3rd party utilities and I saw plenty I really didn't like. The windows to tabs feature is likely not to work properly on applications that weren't designed with such functionality in mind. Apple should not have simply made the clipboard shared across all devices. There may be cases when that could really mess up your workflow, especially if your run a multiple clipboard managers like CopyPaste Pro. Instead Apple should have entended the user-interface to provide access to an independent cloud clipboard. That way -
when - you want to save something in the cloud, you have the freedom to do so - not every time you cut or copy anything. Otherwise you might find yourself with an extremely embarrassing moment when you paste something in public that was perfectly okay in private context when you cut or copied it.
In general I'm seeing Apple gutting two central paradigms of the Mac user-interface that were essential to making great. These principles go all the way back to the
Xerox Alto. Everything could be operated by a mouse and everything could be discovered by exploring. Back in 1989 or so, I was supposed to make demonstration of my Mac II and forgot to bring my keyboard. I was able to complete my demonstration with only the mouse. Try to do that today with your Mac. In the old days you could you learn most of what you needed to know by launching a Mac application and systematically going through all the pulldown menus. Just that process was usually good enough get a reasonably good idea of the programs functionality. Is there any sort of equivalent heuristic you could use today to figure out an iOS app?
Apple products have gotten much harder to use and I fear that Apple engineers are proud of it in the same geeky way that Microsoft engineers were proud of Windows. Us old timers are the only ones who remember was Apple was like and I fear nobody is listening as . . . .
the egalitarian elegance of Apple slowly fades away . . .

Edouard
P.S. So what sort of biometrics is Apple proposing to prevent someone from simply stealing your Apple Watch and using it to unlock your computer? Even it the watch can recognize you, can it recognize whether or not the reason you brought your watch next to your Mac is because a bad guy is holding a knife to your throat?