TV Commercials of TVs

I don't know about you but every time I see a commercial on TV for a TV set, it makes me wonder why the manufacturers even bother.

I mean, if my present TV set is good enough to show the clarity of the model being advertised, why bother change?

And if it is not good enough to show the clarity of the model being advertised, then I won't see the clarity at all. Isn't that right?

Am I missing something or what?