Re: Not even close.
Yeah, TV Makers like most everyone else today are trying to create captive markets. Once you have them, you can fleece them 'til Doomsday since abandoning them by that point means "walking on the sun".
And they're already most of the way there. They'll find ways to make old dumb TVs stop working first (such as with digital changeover), then make sure there's nothing else on the market but TVs protected by patents, trade secrets, and whatever. 4K is showing the next step by locking down the media chain from start to finish and (I think) bonding all device makers to ensure secrets are kept. The days of actually buying anything durable and usable will soon be a faded memory...
Biting the hand that feeds IT
