Let's make this more clear for you...
As of shipping...
1. The HomePod can not be paired in a stereo pairing, nor in even larger home audio groups. If you own 5 HomePods you can NOT for example synchronize them and play holiday Christmas music throughout your house.
2. The above limitation will be fixed by Airplay 2, a software technology "coming later this year" but seemingly fairly soon since iOS 11.3 beta currently being tested for "spring" release had Airplay 2 included. It appears Apple just didn't have the technology ready but didn't want to wait any longer to launch the HomePod.
3. You WILL BE ABLE to Airplay (Airplay 1, what we all have today) audio to any HomePod in your home. You could for example open up YouTube, or Spotify etc. on your iPhone, iPad or Mac and select any one HomePod in your home as a target and the audio will play to it at launch. You just can't pair that music up to multiple HomePods.
It won't be long before Apple fixes this, the idea of having HomePods in various places through your house and saying, "Play U2 in the master bedroom and family room" or "Move this music to the Living Room" is coming, but Apple is no doubt late, and more expensive than others. We will see how they fare.
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That's basically the same conclusion I came to Dan. To be honest i'm hoping it sounds better than a Sonos Play:5 as that's the only one I consider to have even remotely acceptable sound and I still wouldn't want one. Someone said it was done by a head engineer from B&W though, so if it sounds anything like that iPod dock they did back in the day, we're doomed, it was dreadful.
I really like the Sonos Play:5 sound, for me it is more than acceptable. I have two of them. I haven't heard the Play:3 other than in a store and I wasn't impressed. I do have four Play:1's though and while they serve a purpose they are so so muddy sounding, I don't think they are great at all. Hearing the HomePod sounds "better" than the Play:1 is good, but most reviews say it is close and on some songs even tied. That's concerning. They never (I know Apple is forcing this until the 9th) compare it to the Play:5 and to me that must be for a reason, if it is better than the Play:5 they would proudly show how it sounds better than "even this large and more expensive speaker!" but they don't.
I'm still excited for HomePod and have 2 on order as my extensive but older generation fleet of Sonos speakers won't work easily with Airplay 2 later this year, and even if I replaced them with newer ones it still won't be seamless voice control. I want seamless voice control of "good" speakers, they don't have to be insanely great but much better than the every single retailer Amazon Echo models. I still think Alexa is the best smart assistant and I have extensive home automation throughout my home so I do have 8 Amazon Echo Dots at the low cost $29 each to cover home automation until I get acceptable coverage of HomePods. I likely will sell my Sonos collection. Much depends on what my ears hear on February 9th when my first 2 HomePods arrive.