Well, this is a (very welcome) surprise. Of course, like every other early adopter/tinkerer out there, I’ve already got a working solution (courtesy of
zigbee2mqtt, if you haven’t been keeping track), and I’m curious as to how “open source” everything will really be and how fast things will actually move considering that so far each and every one of them tried to build entirely separate ecosystems (and largely made a hash of it, too), but I’m quite looking forward to this actually working out for consumers.
Update: Apple has just open-sourced the HomeKit Accessory Development Kit, and, not to be left behind, Silicon Labs is opening the Z-Wave standard in 2020. This is going to get really interesting.