Aside from the possible turbine use, the materials could be used in IC Engine components, like pistons and combustion chambers or sleeves.
The engines could be run at a much higher temperature for even more fuel efficiency and less pollutants.....................
Interesting that the article is touting the use of this superalloy in powerplant turbines which use superheated steam, rather than in jet engines, which combust kerosene.
Lighter and stronger would be much more valuable in a jet turbine engine than in a powerplant.
The article mentions temperatures up to 800C, which is not very hot for a jet engine. Today's high efficiency jet engines operate their turbines at up to 1,700C, over twice as hot.