Mantle
Mantle
I'm just realizing it might be new information. Apologies for the confusion.
It seems DX12 will follow the same path Mantle was aiming for, making it unnecessary soon. Developers will need to optimize games for multiple-core CPUs, but this isn't the final outcome.
I believe the mantle wasn't meant to last. It was created to push Microsoft to enhance DirectX even more. And hey, I'm sorry like a Canadian!