Relic and THQ have released a new patch for
Company of Heroes. This patch adds DirectX 10 support, but you must have Windows Vista and DX10 supported GPU (R600/G80/G84/G86). The rest of the change log is still unknown at this point, since it is still unannounced at this point. Stay tuned for more possible updates.
DX9 vs. DX10 Video Download