I personally will not buy anything from Apple, but I think it's relevant to the discussion that every vote is cast. It's not a poll for me, it's a discussion for everyone!
All of my laptops have Java 8, IntelliJ, lein (for Clojure and Clojurescript), git, ssh, Chrome, Ruby, and Python installed.
I mostly write my books using markdown and a text editor.
It doesn't really matter which of my laptops I am using. Living in IntelliJ and Chrome makes OS choice not so important.
Edit: I just used the HP Stream 11 exclusively while travelling, and Windows 8.1 is working well for me. I am thinking of switching to a Surface 3 because I like the form factor. One requirement: all of my laptops can connect to a large monitor on the desk in my home office.