New OpenGL profiles (gp4vp, gp4gp, and gp4fp) for GeForce 8 extensions
These expose new DirectX 10-class features including geometry shaders, bindable constant buffers for uniforms, texture arrays, first-class integer support and more
Support for Apple's new "Leopard" release of Mac OS X 10.5
New DirectX 9 profiles (hlslv and hlslf) to cross-translate Cg to HLSL
Documentation updates, including Cg Standard Library and standard CgFX states
New examples demonstrating texture-space bump mapping setup via a geometry shaders, shadow volume generation via a geometry shader, bindable constant buffers, and more
Improved compiler code generation
Runtime performance improvements
Compatibility with Cg 1.5