Apple can easily access a tremendous amount of content. I can see a la carte and bundles of the following components:
1) Apple original content. Bundled free with Apple Music and possibly other content services. By the end of the year they may have a couple dozen original content series, and 50 or more by the end of next year.
2) Licensed video content. Existing TV and theatrical content can be bundled with Apple’s original content, just like Netflix, Amazon Prime, Hulu, etc.
3) Over the top network TV/cable channels. Like Sling, DirecTV Now, Playstation Vue, YouTube TV, Hulu, AT&T, etc. Apple could also start bidding on major league sports seasons or championship events if they want to.
4) Apple Music. With Apple’s original content continuing to be bundled for free.
5) The Texture magazine content. As the article mentions: People, Time, Forbes, ELLE, National Geographic, Rolling Stone, Vogue, and hundreds more.
6) Offering subscriptions and aggregating other paid premium content channels (like Amazon Prime does) for HBO, Showtime, Cinemax, Starz, CBS All access, and many others.
7) Books/audiobooks. iBooks is being re-branded as Apple Books, so something is happening there. Could be print and possibly audiobooks.
All (or most) of the above could be consumed using AppleTV, iOS or macOS at a minimum. Maybe Android and/or Windows and other video devices like Roku or with Apple’s tvOS running directly on a TV.