I'd argue they've already been that for at least several years if not, less brazenly, for a few decades and that the article these comments are in response to is strong evidence to support that determination.
The network effects generated by adding people to your social circle from a group that are at the same career stage and aiming to work in the same industry are also very strong. It is highly likely that they will be the source of job opportunities, recommendations, and useful advice for many years to come.
None of this is really necessary, there are plenty of positions out there that don't receive applicants hailing from top tier universities and making friends with people in your field only requires a modicum of grace and the willingness to put the time in at the appropriate events.
Generally, I agree with the sentiment that the position that universities currently hold is ripe for replacement. The second that someone figures out a workable model that serves most of the important functions (accreditation, education, networking, access to experts, research funding) for a reasonable price the die will be cast.
There was an interesting program on BBC Radio last year that questioned this, they had an example of a student that had excelled during school and went on to the top university for her subject where she found herself in the middle of the pack. This ended any career opportunities in that subject for her.
She knew people who took the same subject at lower tier universities, they came out top of the class and were able to find work in the same subject.