UE 5.4 Preview: Material FX (Blur ?)

Hello everyone!
Looking at some of the new features in 5.4 where or how exactly are we meant to use BLUR, i can find CC/Glow and Distort in the new material authoring system for motion graphics but where / how do we use BLUR ?

Thank you

Also unrelated question is the thumbnail for material FX AI generated ? The blur looks EXACTLY like that i want to make in UE 5.4P i hope its possible.