FWI: Supercritical CO2 Turbines

China has created a Supercritical CO2 engine and claims to be getting megawatts of power from it, although it's deeply unclear if this is safe or how stable this design will be over the long term.

Supercritical CO2 Turbines, if they can work fully as promised, would make serious advances over the 35% efficiency of today's steam turbines, and potentially could be backadded to a litany of power plants to get more power out of the game reactions, but is this actually going to happen, or is this decades away due to materials science and costs not being ready to do it, or is this simply a fantastical pipe dream that will never wind up happening?