https://rocm.github.io/dl.html
Includes a compiler to replace nvcc that can build CUDA for either Nvidia or AMD GPUs. This could make adding support quite painless for most code.
Would definitely be nice to have some hardware options beyond Nvidia (even as all the 580s are impossible to buy because of cryptocurrency miners). Especially since many laptops, such as Macbook Pros, only have AMD options.
I’m hoping this gains some traction!