Without a subscription, I can't read the entire article, but I can offer a little local insight that was detailed at a recent local meeting of the Knox Co Board of Education:
The number of kids hospitalized with CV19 at Children's includes a significant number that were hospitalized for an unrelated condition and tested positive, a situation that obviously creates a number of questions (test reliability/PCR threshold, significance of asymptomatic infection, etc). Assuming that this trend generalizes on a national level and that vaccination of older adults holds effective, I would think that the percentage of "hospitalizations" accounted for by the younger demographic will continue to rise.
It is important to consider the severity/outcome of these cases and hospitalizations. If they are basically all recovering without sequelae and no deaths, it's really a non-issue.