It seems to me it's the last thing that can be removed to complete the 180.
It might not cost much, but when you're expecting to sell millions of units every little adds up, and they might be tempted to remove something not many people seem to use (e.g., Sony removing USB ports from PS3).
Also, getting rid of TV support might free up some resources from the OS that they can redirect towards games.
No troll is too much for me to handle. I rehabilitate trolls, I train people. I am the Troll Whisperer.