I have been using the Nvidia Shield for about two months and I have to say it totally blows Roku out of the water, the main test for me was Amazon as it always seemed slow to load and I constantly got "Not enough Band width" The Shield is lightening fast and has not once faltered on any playback. I had no Idea what Kodi was and at first glance still didn't But Wow! now I have a reasonable command of it you should ditch Roku for that alone. I have been loyal to Roku since the week it was introduced, I have at least 5 players including 2 ultras and will continue to carry one on the road with me, but at home it's dead. In closing all I can say is "Roku you need to up your game" and the second you have a better product than Nvidia, I will be at your doorstep, but until then I am a glowing Nvidia Shield Person of Good Streaming Taste.
OK Bring on the hate filled comments