Too bad it only works inside Apples suffocatingly small walled garden. If the audio quality is as good as people are saying I would happily buy one just for that, ignoring Siri, but you just can't play nice can you Apple? I'm sure theres a lot of audiophiles using Android who would have bought one too, but nope, only Apple hardware and Apple software.
Honestly, even though I'm not particularly interested in home automation or digital assistants, Apple feels like they're 4 years behind everyone else. Theres tons of products that work with Google and Amazons offerings, often with cross compatibility, not to mention Google has a pile of free API's that work on inexpensive hardware like the Raspberry Pi, making home automation for the DIYer a dream and making 3rd party development a dream.
I feel like Apples walled garden approach is going to really slow down the adoption rate and availability of Homekit compatible hardware and software, and Homekit might end up like Windows phone.