I never reallyed used playroom but one thing has caught my eye.
"Next, if you have recorded videos on your PS4, you will be able to play them back inside a dedicated projector. This is a really cool feature and great way for you to do live commentaries over your recorded game sessions and maybe even give out some advice to those watching you."
This sounds like a great way to go back and offer tips of why something did or did not work in games like CoD. Kind of like a sports broadcaster would show an instant replay.
I am also thinking about doing a 4GC weekley recap in Destiny in this format.