That was a rhetorical - because, yes it does. If you're saying that it will be optional, then by definition it won't be included in every TV. So pick which statement you really support, because they can't coexist.
Tube TVs are apples to orange. They were replaced by technology that made TVs directly better in pretty much every fundamental way - better picture; much, much smaller, lighter construction; much more versatile, etc. Smart TVs just add extra features, unnecessary to many and currently handled better by standalone boxes.
I'm not necessarily disagreeing - at least if we're talking relatively distant in the future, as part of the broadening "smart everything" movement, but you haven't really presented any evidence. Do you have any or just conjecture? Because another did present evidence ... of movement in the exact opposite direction.