What's the Verdict—Serious Question about Devialet Phantom

While perusing European real estate sites, I sometimes see the Devialet Phantom speakers, usually staged in  $10M+ apartments. I’m wondering if they are actually audiophile material or just a shiny furnishing for the average million/billionaire pied-à-terre casual music listener. I don’t have any interest in buying these, but I am curious. Thanks!