It's just another "feature" that might look good on paper, especially for marketing and standing out among probably better products. In the end, I expect that the cost will far outweigh the benefits of such a "cover". The only thing that would normally direct a lot of heat to the motherboard would be poorly designed cooling of enthusiast graphics cards. I think it will be better to come up with better graphics card cooler designs that dont blow so much hot air back into the case and at the motherboard. At least this cover would protect the board from accidental damage from dropping a heavy graphics card while working on the pc, or a slipping screw driver. But then, they should cover those last few open spaces too. Oh, and since when does the CPU blow cool air? If it's blowing cool air, then there must be something wrong with your CPU cooler setup! *raises one eyebrow*