I've never seen any demonstration of OpenCL on Windows. It's up to the Windows community to support the new features, not Sun. Windows doesn't even fully support OpenGL 2.1. You'd be lucky to see OpenGL 3.0 for Windows, but it's highly doubtful that you'll see that new OpenCL for the multi cores any time soon.

On another note, is anyone using DirectX 10? I thought that a few games were released using it, but they all flopped so developers are sticking with DX 9.