Nice, I've been updating an old program I wrote (moving to Swift, new interface), and have really enjoyed Filters. I am wondering where CoreImage Filters fit into the Metal 2 world. I am probably wrong, but my assumption is that Metal will replace all of the Filters and even OpenCL[1]. I haven't started the conversion myself, as converting to Swift has been my main focus.
1) https://developer.apple.com/videos/play/metal/10/