Robert McNeel & Associates have recently released Rhinoceros 6 for Windows.
Since this version, Grasshopper is now a full-fledged part of Rhino and provides the solid foundation for many incredible third-party components ranging from environmental analysis to robotic control.
Rhino’s new display pipeline is faster, more stable, and uses features found on modern graphics hardware, like GPU computed shaders and memory optimizations.
Rhino now has a realtime ray-traced viewport mode as well as realtime previews with SSAO, Decals, Image-based lighting, and screen- and world-based mapping.
Moreover, now it’s easier to create and assign materials, with new simple materials and a material library packed full of ready-to-use, real-world scale textures.
Rendering controls are better organized in the new Rendering panel. You are no longer restricted to rendering the active view. You can specify a specific viewport, a named view, or even a snapshot.
UV Unwrapping now works on multiple objects, making it easier to set up texture maps.
… and other adjustments and bug fixes.
More info about new features and licensing on Rhino website