Seems rather subjective. Do I need a TV? I own one, so does that make me greedy? What about a computer?
Owning a TV or PC is not necessarily greedy when the living standards of your society make it basically mandatory to have a computer for research and other tasks. A TV is an important tool for communication and entertainment (which is very important). Now if you had a TV in every room you might be getting a little bit greedy. The resources and labor that went into that could have been used for people who actually need a TV, or perhaps if there wasn't such a large demand for things people don't actually need we wouldn't need to tear down forests and destroy the environment at such a rapid pace. Greed always has a consequence, that is why it's "greedy".
I disagree. TV's are completely unimportant and I think having even one is greedy. There are far better ways to entertain yourself: read a book, play a board game, work out, play online games or take up a hobby. You don't need TV for communication either, as you can get all your news from the internet more efficiently and with a broader diversity of views and opinions. The resources from your TV would be better spent building computers for people who don't have them and need one for entertainment and communication.