One thing this makes possible – accelerated memcpy. Of course, it is only worthwhile once the memory buffer to be copied is large enough. But the copy speed could be greatly increased if it could all be done inside the memory module. And of course, that only works if the source and destination buffers are physically on the same module. But, if your application allocates 1GB pages, the OS could attempt to ensure they are on the same memory module.

Accelerated memcpy is already offered by some Intel server systems (QuickData aka IOATDMA aka CBDMA aka SDMA), but it uses a memory-to-memory DMA engine on the CPU die, so the memory to be copied still has to travel back and forward between the CPU and the memory modules via the memory controller, even though using a DMA engine means it isn't consuming a CPU core. With this, the same process could be made much faster, bypassing the CPU entirely, provided the source and destination are on the same module.