But better knowledge will
always be important for social mobility, at the very least via earning more money.
OTOH the traditional college may be not the best way to acquire certain kinds of knowledge. In many cases learning outside campus using recorded lectures, books, and computers may be as efficient, and visiting labs for necessary work could be vastly less expensive than doing full-time college.
I suspect the value of certain independent examinations / certifications, that is, the comparative advantage they give, will grow with time. The effort of passing them will be (or already is) university-level high, and the prices will also grow, but definitely not to the level of college prices.
This will democratize learning because of the lower prices, easier choice of time / pace, and easier choice of what you really want to learn. It's already happening, of course, but it's low-key by now. I posit that it will be a major force.
Certain things, like medicine, are not amenable to this approach, or course. But a lot of STEM, financial, media, even liberal arts curricula can benefit from such an approach.