The channel includes films from Lionsgate, MGM and Sony Pictures, but also Roku channel publishers like Popcornflix. It's free for all users, so don't expect to see new releases. Instead of additional fees, it relies on ads, though the company noted that fans should see half as many commercials as on a typical television broadcast. This is just the first of many such ad-supported channels in the next phase for Roku', which had its IPO a couple weeks ago that saw its value jump to over $2 billion.
Users won't see the channel unless they manually add it, either online or through their device's channel store. The "Roku Channel" can be found under Streaming Channels in "Featured," "New & Notable," and "Movies & TV."