Put bluntly, the system was built around the new Kinect. Having the system without the Kinect, is like having only half an Xbox One.
I absolutely disagree. You make it sound like not having the Kinect means that nothing about the console is more than half-complete. I never needed the Kinect while playing
Shadow of Mordor. I never need it at all during gaming, though are rare instances where I will use it to snap the Achievements app (something I do with the controller 90% of the time now anyway). You can absolutely survive without the Kinect, and do it well. If you aren't one to multitask and use all of the media apps, and you want the Xbox One solely for gaming (and not
Kinect Sports Rivals), then the Kinect is not only optional, but almost a waste. I don't mind that I have the Kinect now (got it before the bundles without it were out there), but I'd absolutely trade the $100 Kinect for 2 more games or a game and a controller, because the more I use my Xbox, and the more they expand navigation without the Kinect, the less I use the Kinect. I went from using it for most of my navigation to using it maybe once or twice in the past week-plus, during which I was almost constantly playing
Mordor.
Simply put, the Kinect has been mostly a flop for gaming, so if you're solely a gamer on the One, and you're not a social media person (Twitter/YouTube/Twitch/Facebook uploader), the Kinect's totally optional, and the furthest things from half of the console.
Again, I don't use Netflix, or YouTube (except for music videos on my PC), or Hulu, or anything else on my Xbox One. I play games, and that's it. I don't do the whole Game DVR thing, and the only rare instance I use for streaming is to show a game to a friend (and I don't use the Kinect for that). The Kinect, to me, is more like and SSD in a computer. It's nice to have the extra speed (for a SSD, in loading times, for the Kinect, in UI navigation), but I could go back to booting my computer from my HDD, and I wouldn't feel worse for wear (but the SSD was only $25, so I was willing to eat that cost).