I hope this doesn't come off as handwaving, but you're kinda comparing apples to oranges here. CUDA has always been in a class of it's own when it comes to GPU compute, for better and worse, so I think the people out there who want to use this will pretty quickly get an idea of who it's for. Benchmarks would be nice, but I don't really think they'd be germane when comparing a proprietary compute system with a generic cross-platform GPU binding.