You don't know what you're talking about if you're saying you're better off getting a little Roku stick...
Roku is garbage, basically the worst experience to use for a person with a 'smart tv'. I have a 4k FireStick hooked up to my Roku Tv for a reason, same with my Vizio TV in my garage, same with my 82'' Samsung which is almost as bad as the Roku in terms of interface... Support for Firesticks seems to be the best in my opinion. HOWEVER, the Dolby Atmos capability of this and the 4k upscaling of this Nvidia Shield is appealing I wonder how well it even works, I've never been a big believer in upscaling personally.