I caught that as well. Further reading it looks like they had a ~2x improvement over a flat aluminium sheet (Which itself performed worse then the bare TEG). And of that improvement about half came from radiative cooling.

So my very hot take is that a conventional forced air finned radiator treated with this laser process would show an improvement, it is unlikely to be economically viable versus just using a bigger radiator (at desktop/server CPU/GPU scales). At laptop scales it might be more viable given space constraints.