Edit: Fixed the images by changing their source
As this article states, "Pixel art lives both in and beyond computer screens." You might have not notice it, but people have been using pixel art long before the computer screen was invented. For example, Lego's, Cross-Stitching, and even stippling have been practice forms of design for quite some time. At its core, pixel art directly correlated to the Gestalt Theory of design. Basically, this style needs other nearby pixels to represent an object as a whole.
To view the entire collection of pixel art and artists, visit this website article: http://www.smashingmagazine.com/2008/05/05/pixels-go-mad-the-celebration-of-pixel-art/
Here are some of images I enjoyed finding:
Pixel art meets Lego (I'm pretty sure this has absolutely no Lego pieces in this artwork, but that's what they called it I guess haha).
Panda Cross Stitch
Continue the celebration of pixel art by trying it out yourself! Just as I mentioned earlier, it can be made out of anything!