...because we've talked about it enough in other threads
The image code isn't working for me ATM so here's some choice bits
According to AMD, it will be possible to have up to 100K render calls per frames with Mantle, while today, optimized render codes achieve only 10k draw calls/frame.
Another interesting fact is that Mantle is not limited to AMD Radeon GCN architecture. The core of Mantle could be ported to other GPUs (NVIDIA for example, some NVIDIA GPU designers were present at the AMD Mantle talk #APU13).