Hrm.
Only thing I cared about on that list was the Start menu, and even that is cluttered up with that "live tiles" crap.
The rest of it..... meh. I don't have multiple devices to share data/apps/setting between, I don't have an XBox to stream from (or any idea why I'd want to), I don't have touch capability (which is good, because it'd be wasted on a desktop computer - reaching across the desk to do something you could easily do with KB+M is moronic), and I don't have anything throwing notifications at me (no twitter, no RSS, no facebook, etc). Don't want to talk to my computer, or be leashed to some networked storage system. I don't need "spaces" style multitasking, and I do my web browsing on Firefox on my Mac.
(Of course, this is nothing new - every year, I see the article of "see all the best new features in the new OS X!", look through them, and think.... "wow, nothing I care about". Which is why I only just updated from 10.6 to 10.10, and only because I was forced.)
Just want to be able to run my programs, on an OS that's designed for desktop/keyboard/mouse. That's it. If it does that, fine. If it makes everything unusable with layers and layers of trendy/modern crap, no thanks.
But, yeah.. I realize I'm not their (or Apple's) target audience at this point. Too old, too "traditional", not leaping onto every new online/mobile/social/cloud technology that the salesmen keep pumping out. Sigh.