Yes, the NVIDIA Shield fully supports 4K streaming. It is capable of delivering 4K content at 60 frames per second, and will also upscale content from 360p to up to 1440p for better viewing of older content. But, importantly, not all streaming devices with the technical capability of delivering 4K are authorized to access 4K content on certain streaming services such as Netflix and Prime Video, which restrict access to 4K content to authorized devices. However, fortunately, the NVIDIA Shield is an authorized device, so you will be able to watch all your favorite shows from these services in full 4K.