What does that means for us? Java programmers...Read this article: Tech Giants [...] Join the HSA Foundation
HSA seems to be an architecture (or concept?), that allows CPU and GPU to access the same adress space, i.e. passing pointers instead of copying data, and other stuff. The new AMD third generation APU (Kaveri) A10-7850K will have this. Kaveri will include AMD’s Mantle API .
The article above says that many companies, including Oracle, are members of the HSA Foundation. It says also, by joining HSA Foundation Oracle strives for better utilization of the GPU with Java.
Other interesting things:
 Java 8 Sumatra processing demo (Sumatra is an OpenJDK Project to allow to take advantage of GPUs and APUs)
 a biased article with more details about the APUs (read also comments of user Ken Luskin for more background info)
edit: Oh, I see there is already a thread about HSA+Java.