Article is very light on detail, but from the MS announcement, this seems to be essentially a distro for IoT and the like; I was about to ask what it's based on

Article is very light on detail, but from the MS announcement, this seems to be essentially a distro for IoT and the like; I was about to ask what it's based on, but having read that, I'll be guessing it's minimal and built from the ground up. I'm also very curious about what the microcontroller design announced involves - obviously powerful enough to run Linux, and customisable, so I'd be guessing ARM based (small chance of MIPS or RISC, but probably not)