If you weren't aware of carpet as a design element as yet, here is a great showcase.
Textile and carpet design is certainly not as easy as it looks. Besides controlled use as an accent or bold design statement, it needs to be a tasteful backdrop that doesn't overtake a space yet the texture and tone has a major impact on the experience of the space. For large application of carpet tiles as field carpet, it requires creative design to generate organic patterning so surfaces don't become dizzying pattern as seen on video game texture maps.
It is at the core of graphic design where elements such as lines, textures, orientation, negative space, pattern modularity, micro + macro appearance and three dimensional illusion all need to be carefully considered.