My take on the "c button"

Hi guys, i dont know if its been discussed before but i thnk i have an idea about this new "c" button we saw on switch 2 leaks. We kinda know that new dock has a fan built in. So why does it have a fan? Because there is a chip unlike a regular switch dock. Also i mostly play games on handheld mode because it takes time to put it on dock and combine joycons (i dont have a prp controller). I think this c button will CAST the game to the dock and it will immediately displays the game on tv. That way we can instantly start playing on bigger screen but casted game will feature handheld resolution or so. I thnik its very logical to make docking process faster or not needed for the upcoming console. What do you think about it?