The ornamental design for a walldisplayassembly, as shown and described.
FIG. 1 is a top, perspective view of a wall display assembly showing our new design, the vertical side rails, several horizontal cross members, and various connective structures being shown in broken lines for illustrative purposes only and forming no part of the claimed design;
FIG. 2 is a bottom perspective view thereof;
FIG. 3 is an enlarged bottom rear perspective view thereof;
FIG. 4 is an enlarged front perspective view thereof;
FIG. 5 is another enlarged top perspective view of the wall display system;
FIG. 6 is another enlarged bottom perspective view thereof;
FIG. 7 is an enlarged front view thereof;
FIG. 8 is an enlarged side view thereof;
FIG. 9 is an enlarged rear view thereof;
FIG. 10 is an enlarged opposite side view thereof;