The ornamental design for a displayfurniture, as shown and described.
FIG. 1 is a left perspective view of the display furniture, showing my new design;
FIG. 2 is a right perspective view thereof; and,
FIG. 3 is a front perspective view thereof.
The rear of the furniture is substantially unadorned and does not form a part of the claim. In the drawings, the broken lines show portions of the furniture and form no part of the claim design.