What do you mean? The new “Pointiness” feature?
Left: Just plain grey diffuse color / Right: “Pointiness” used to drive diffuse color
Nodes:
Of course you could also use the “Pointiness” to drive a mix factor between different shaders or to control the roughness of a glossy shader or… You get the idea.
The effect of the “Pointiness” is quite subtle, you will most likely need a ColorRamp to increase the contrast.