This is not all that new of an idea. I had one of these around 2005/2006: https://www.quietpc.com/hfx-mini-metal - completely fanless and (virtually) silent - back in those days there were no SSDs, so one had to content onesself with slow spindle speed HDDs mounted on soft rubber to minimise vibrations.

Despite the fact that the mfr appears to think it's a "revolutionary" idea, I'm not really seeing any material difference between that and the case above, from over 10 years ago. Perhaps I'm wrong though?