#4 Is an hdmi 2 compliant cable needed to get the full 4k image?
Yes using an hdmi will play 4k to get 4k, most streaming services require 25mb and then they have to have 4k content. Don't matter what cord you use. With all that said. Buy it. You won't regret it. But all the info about the usb is located on this page. 3 hdmi ports.