As stupid as it may sound, I really dislike laptops with 16:9 screens. That is why, together with other small things such as build quality, that I cannot seem to find anything better than Macbooks to fit my taste..
It's the most impressive laptop I've ever used. Great 3:2 screen, excellent build quality, a real touchscreen (i.e., multitouch, pen support with pressure, etc), MacBook-tier trackpad. Convertible tablet mode is far more useful than I anticipated and is nice for showing off. The new Linux subsystem is still a bit buggy but is very impressive (I was able to compile and run emacs with a GUI as if I was running Ubuntu natively, for example).
Also it's still limited to 16GB RAM on the upper end right?
The top model has an i7 and 512GB/16GB (same dGPU). It was about EUR1000 more if I recall correctly, not worth it to me.
Not sure about hardware refresh. I've seen rumours around that they might hold off for Intel's Kaby Lake parts which would mean 2017, but who knows.
Also, do you consider a 64GB SSD to be sufficient for a developer?
Driver support wise it takes a year plus for all the hardware to get supported in the mainline Linux kernel is what I have found. What works is to dump the distro kernel and use the latest stable mainline.
If SD storage was reliable, which in my personal experience is not, then that would be a killer machine indeed.