I really like the idea of these, but I'm having a hard time imagining a use scenario even though we are full in on the google ecosystem. Our living room has 'real' hifi, but does have a google home mini but just to yell instructions to it for smart home stuff, etc. So this is a non-upgrade since we don't use the living room google speaker to play music. In the dining/kitchen I need something that can mount on/in wall and look nice or even just disappear, the wall wart kills this for me. I'm also kicking around getting some speakers for the garage to upgrade over a small Bluetooth speaker. These would work there but I feel for a little more $ I can get something like the JBL 305P and have a ton more SPL/low freq capability due to much larger driver. On the other hand that doesn't have the smarts/streaming capability. Maybe that's OK but it would be really nice to tell it to skip a song or go to different playlist without having to touch my phone with grease and oil covered hands. Something like the 305P is also much bulkier and not as inside of the home friendly.
As someone else said if they put a little bigger driver or added a 'sub' this would be an amazing proposition. But then they are probably not targeting that much SPL/low freq extension, form factor/size was more important. I guess many of us are in the same basic boat, but we are probably not typical users. It's great that this is $100, has streaming, looks good, is small enough to make most people happy with putting it anywhere in their home, and has well thought out audio to boot.