There is not one idea behind Vulkan, but many. It's not just a question about performance. Vulkan should make it easier to write libraries and middleware, for

There is not one idea behind Vulkan, but many. It's not just a question about performance. Vulkan should make it easier to write libraries and middleware, for example. Vulkan will make it easier to use multiple threads. Vulkan will make it easier to write shaders, because you don't have to rely on the driver's compiler as much. I think we'll have to wait and see how people actually use it. I know from answering Stack Overflow questions that a lot of people are still using glVertex().