So long as we are stuck with heat engines and that does look to be for a long time, ZT matters hugely. So this work is big news and may well pay of with superior hardware. We often forget just how much human effort went into inventing the engines and refrigerators we now use. In fact it is a cautionary for all new tech.
Again this is promising and suggests that superior solutions are not too far along for mass consumption. Sadly we will barely notice when it lands as what we do use is heavily optimized already and new tech means a new cycle of integration and optimization.
Still good and welcome.