NVIDIA claims developers can accelerate their applications by eight times by simply replacing CPU-based libraries with the CUDA-based alternatives. CUDA 6 provides unified memory support for accessing CPU and GPU memory without copies, new drop-in libraries for BLAS and FFTW calculations on the GPU, new multi-GPU scaling support, and various other changes.
More details on NVIDIA CUDA 6 can be found via the NVIDIA Newsroom. The unified memory support makes sense and was expected considering in a recent NVIDIA Linux driver update they introduced a new Unified Kernel Memory module for unifying the memory space between the GPU's video memory and the system's RAM.
For those that missed the earlier news items, NVIDIA is dropping 32-bit Linux CUDA support and we have a lot of new NVIDIA Linux GPU benchmarks coming!