Because streaming services only release viewership numbers selectively, and because each one uses its own methodology, it can be hard to compare the popularity of different streaming shows and movies.

So Nielsen, which provides the standard ratings for traditional TV (and is working to combine those ratings with streaming data), is offering some apples-to-apples comparison today at CES by releasing its own lists of the most popular streaming content in 2020, across Netflix, Amazon Prime, Disney+ and Hulu.