I don't want to join in the bandwagon of naysayers who think they know Apple very well because none of us actually do.
Instead, I'll look at how it can possibly be true.
First point: The iPhone was released amidst a sea of dumb smartphones but did this fact stop Apple from dominating and changing the market, so I a crowded market a deterrent to Apple to re-introduce TV to the world? NO
Second point: The way TV is done by current competitors and Apple themselves, is that the focus is being heavily shifted to go through the web, which of course traditional media firms don't like. But what if you have an appliance that connects the way it did to traditional networks but once contents gets in you can control it the way you want. Apple is about user experience, maybe they have developed a way to make traditional TV more fun and interactive to use.
Third point: Apple is an electronic appliance company now more than ever and have been eyeing on capturing the living room for a while now. The TV is the center of the living room and instead of plugging in on to one why not make an actual set, that way you cut out competition from more established appliance manufacturers?
Fourth point: Apple already has a game console which is considered the hub of home entertainment, it's called iPad.
So is it still impossible for Apple to bring out a TV? NO. So let's just wait for new information to come.