Developer Antonio Vazquez has just implemented the first modifiers for Grease Pencil objects.

Check out this demo by Daniel Martinez Lara:

The new modifiers shown in this video:

Array

Lattice

Simplify

Noise

Tint

Hue Saturation Value

Blur

Even though more modifiers are planned, focus now is to squash as many bugs as possible before the merge with the main Blender 2.8. This development is currently happening on the ‘greasepencil-object’ branch.

PS: Watch it until the end for a nice surprise!