The ornamental design for display furniture, as shown and described.
FIG. 1 is a front perspective view of the display furniture with a round swivel display and a swivel support table in a given, first position, showing our new design;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a right front perspective view, showing a set of front drawers in an open position;
FIG. 4 is a rear perspective view thereof; and,
FIG. 5 is a front perspective view with the round swivel display suggesting a global map thereon.
In the drawings, the broken lines show portions of the furniture, including a set of five speakers along the rounded frame, a flat panel television set and controls in FIGS. 1-4, and a globe in FIG. 5; the broken line showings do not form part of the claimed design.