Dell have just reduced the range available online.
Possible sign that Kaby Lake refresh is out soon.
Intel demoed a Kaby Lake XPS13 at IDF recently. Someone on Reddit claims that Dell support told them that a Kaby XPS13 would be released in September, although most of the Kaby Lake rumours say it'll not hit the market until late December.
I'm on the lookout for a new laptop but I'm still on the fence between the XPS13 and the XPS15. I don't think the next refresh of the XP15 will come with a 1060, I reckon it'll be more like a 1050, and I wonder how long it'll take for that to come out.