Of course employers will embrace skills-based certifications, as they essentially offload the cost of any specialized training to the employee. Until now, it was not uncommon for the employer to pay (directly or indirectly) for the additional training.
But I'm not sure if getting a specialization certification without having a solid background on the topic is a good idea. It will be like the hordes of self-taught plugin programmers that made the Wordpress platform a liability to run.
In the end, the problem is not the value of the four-year university degree. The problem is its price. Pretending that the price can't be lowered, so we have to investigate alternative modes of higher education, is both untruthful and undemocratic.