The ornamental design for a handheld and head-mounted display, as shown and described.
FIG. 1 is a front view of a handheld and head-mounted display according to my design;
FIG. 2 is a back view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a bottom view thereof;
FIG. 5 is a left view thereof;
FIG. 6 is a right view thereof;
FIG. 7 is a perspective view thereof;
FIG. 8 is a section view along the line indicated by reference numerals 8 in FIG. 1; and,
FIG. 9 is a section view along the line indicated by reference numerals 9 in FIG. 1.
The dash-dotted broken lines indicate a boundary of the claimed design; the other broken lines illustrate portions of the handheld and head-mounted display that form no portion of the claimed design.