I'm not sure what looks worse, worn out carpet from an office chair rolling around over it daily or that protective clear plastic chair mat on top of it. The solution is simply to get a chair mat that actually looks stylish, like this cool new Diamond-Plate Chair Mat.
This high-performance chair mat combines the rugged, industrial style of aluminum diamond plate with the flexibility and durability of a quality chair mat. It features multi-layer construction, a special scratch-proof clearcoat film, durable two-tone binding and rubber nib backing. An even cooler solution would be to simply tear up all the carpet and cover the entire floor in diamond plate (hmm, or cork)!