From Wikipedia on New Media Art:

New media art is an art genre that encompasses artworks created with new media technologies, including computer graphics, computer animation, the Internet, interactive technologies, robotics, and biotechnologies. The term differentiates itself by its resulting cultural objects, which can be seen in opposition to those deriving from old media arts (i.e. traditional painting, sculpture, etc.) This concern with medium is a key feature of much contemporary art and indeed many art schools now offer a major in “New Genres” or “New Media.” New Media concerns are often derived from thetelecommunications, mass media and digital modes of delivery the artworks involve, with practices ranging from conceptual tovirtual art, performance to installation. 

I’m sitting here with my wife and she is taking a music quiz on Facebook, and yelling curses and laughing at her computer.  New media (art) is everywhere, even in the ephemeral performance of Facebook quizzing.  Last night we sat and watched talking cat videos on Youtube; the art might not be good, but it is art (at least that is the way I look at it).  People are making new forms of expressive, informative, critical, and possibly transcendent “New Media Art” without calling it such.  Of course, this has always been the case, with people making things for their own pleasure (aesthetic enjoyment), but now we–the general viewer–get to see it.