WordNet (r) 3.0 (2006):

eye candy
    n 1: visual images that are pleasing to see but are
         intellectually undemanding; "he wanted to put some eye
         candy on their web site"

The Jargon File (version 4.4.7, 29 Dec 2003):

eye candy
 /i:' kand`ee/, n.

    [from mainstream slang ?ear candy?] A display of some sort that's presented
    to lusers to keep them distracted while the program performs necessary
    background tasks. ?Give 'em some eye candy while the back-end slurps that
    BLOB into core.? Reported as mainstream usage among players of
    graphics-heavy computer games. We're also told this term is mainstream
    slang for soft pornography, but that sense does not appear to be live among
    hackers.