Obviously the one with the best and most content and that is and will be Sony. The one needs a cable box and although Microsoft is receiving tv services via aps, the same is for Sony backed up with exclusive deals and their own huge library.
Why do you believe Sony will have the best and most content? I am asking this question because people as yourself tend to believe this but I am not sure why. Sony does not support at this time any cable TV apps. Sony content is sold to the same cable companies and streaming services now. Do people think Sony will stop doing this because that is huge revenue for the company. At best, I can only see Sony matching content.
I guess you shut them up... LOL
Now they will respond....
Buy all three like me and be happy :)