Roku 4 review: 4K is nice, but otherwise it's not a huge upgrade
 

It's no surprise that the Roku 4 is a solid set-top box -- Roku has been making them for a while now, after all. It's also not surprising that the new Roku's search is smart, that the interface is fast and fluid or that there's a bountiful selectio...

http://www.engadget.com/2015/11/03/roku-4-review/