Apple wants as many people as possible to have access to its upcoming streaming video service -- even if they don't have Apple TV. It's been working with a number of TV makers on AirPlay 2 and iTunes compatibility, so they can easily watch Apple's original shows and movies on larger screens. Now, Apple is close to sealing a deal with Roku for AirPlay 2 support, according to MacRumors.
If the two sides come to an agreement, AirPlay 2 compatibility will likely arrive on Roku devices through a software update, but it's not yet clear which models will support it. It seems Roku smart TVs, such as those from TCL and RCA, will enable AirPlay 2 as well. With Apple preparing to announce its video streaming service (quite possibly at its March 25th event), we might get official confirmation on the Roku deal soon.
Update 3/11/2019 4:35 PM ET: Updated to note the date of Apple's upcoming event.