What I do wish is for the pubic perception of 'screentime' to not include _everything_. This morning my almost 3 year daughter and I watched 30 minutes of Daniel Tiger, 5 minutes of planes landing, and 10 minutes of ballet performances. All highly engaging with questions flowing from her about every aspect. It's not like I sat her in a corner to play some skinner box slot machine for an hour _or_ some brain dead flashy cartoon.
If the question is whether it's a good idea to let your kids sit in front of a slot machine that collects the data they input _and_ the words the say to friends in an effort to further manipulate them then I could have saved you a study. :D