I think people are forgetting that the HomePod is aimed to be a higher end speaker, yes the Echo and Google have speakers but the HomePod is suppose to be a lot better. Do people remember the early reviews back in June last year?
"HomePod puts vocals in a direct center channel, and beams ambient sounds around for what Apple says is a more omnidirectional music experience. I walked around, and it sounded good from multiple parts of the room. Apple said HomePod can separate vocals and other parts of the music via Apple Music, but that more recent recordings will perform the separation better […]
HomePod came off as bolder and more vivid than Sonos Play:3 in the experience I tried, and a lot better than Amazon Echo. I’d also say the music sounded consistently vivid and crisp in a quiet space, more so than the Sonos and Amazon comparisons on-hand." - CNET
"The HomePod however, sounded crisp and bright no matter the musical genre fed through it — it rendered The Eagles as well it did Kendrick Lamar. As a reminder, there’s a huge woofer and seven tweeters inside, all meant to make audio sound as vivid as possible no matter where you are in a room. It works. The PLAY:3 was generally very good, but audio felt remarkably closed off when I wasn’t sitting right in front of it. If listening to the HomePod was like listening to a CD, then audio through the Echo sounded like AM radio." - The Verge
A lot of people have been comparing the HomePod to Amazon Echo's and Google Home devices (which was expected) BUT they have been doing it on the voice assistant side, a lot of people seem to be forgetting the speaker and sound side.
ALL of those review's (back in June) spoke about how good the HomePod is as a speaker and how much better it was compared to the Echo, Google Home and even competes well with Sonos.
"As Sia’s The Greatest played out, the HomePod sounded impressive: strong bass rang out – which was perhaps the overriding audio takeaway for the speaker – but the vocals still seemed sharp and crisp.
In comparison, the Sonos Play:3 appeared uncharacteristically flat, while the Amazon Echo felt almost pedestrian.
We listened to Superstition by Stevie Wonder and DNA by Kendrick Lamar. Both sounded good on the Sonos but appeared punchier and louder on the HomePod. As we moved around the room, the HomePod managed to project in every direction, with no discernible sweet spot.
We also heard a pair of HomePods playing a live recording of Hotel California by The Eagles. The attention to detail was striking, with different instruments sounding discretely realised. Did we feel like we were at the concert? Maybe not, but it did sound powerful." - What HiFi
https://9to5mac.com/2017/06/06/homepod-review-sound-quality-audio-quality-hifi/
Personally i think this is where the HomePod will shine! The assistant side of it will get better over time with Apple probably adding new Siri features for the HomePod (don't forget that WWDC is in June).