New Disney and Apple TV are now streaming on all Roku devices Power, picture, performance: Roku Ultra lets you stream free, live and premium TV over the Internet; right on your 4K TV; Roku's top of the line media player with a quad-core processor and our best wireless, Roku Ultra is perfect for heavy streaming in HD, 4K, and HDR Ultimate connectivity: No matter what you're streaming, enjoy a strong connection with dual-band wireless or use the Ethernet port for wired streaming