I don’t think TR needs our help doing marketing and user research, 
They have a solid stance on leaving the entertainment to each person. It’s the right choice, IMHO, because they can’t possibly please everyone with one choice (music, video playback, virtual world, etc.)
I support that stance, because people can choose as much or as little as they want or need to make their desired training experience.
If you want and are willing to pay for additional entertainment, you can use something like Zwift in addition to TR. Many of us have been doing that for years.
Here is how you can do it:
There are other apps like Rouvy, FulGaz, and pending ones from Virtugo and Road Grand Tours that are video and/or virtual cycling experiences.