It is hard to define what the "general public" is in your post. But I will assume, that you mean, at one day will 50% of the population that has access to a computer will be able to code.

And from me, I think that is an easy "No". I don't know why they would want to either. A lot people are not interested in buildings things (physical or digital) and are not interested in how things work. If they were, then I think by this point the general public would know how a car works, but I would say most people don't have a non trivial understanding of a simple motor.

Moreover, I think you are highly overestimating the ability of the general public in that it is a "small step" from going from wrapping text with some kind of special marker (<b>,<i>, etc...) to change the font style to how a DOM and layout engine works. In my experience, obviously this is very anecdotal, it is hard to explain the difference between block elements and inline elements, margins and padding to people that are smart (at least in my opinion) and truly want to learn.