The whole point of the covid vaccines was to reduce severe illness resulting in hospitalizations and deaths. If the current vaccines have a wide enough range to keep down serious illness (hospitalizations) with future variants, there will be no need for boosters. Or possibly only boosters needed for a subsection of the population who are known to develop less immune response to the initial doses (elderly, immune suppressed).
I want to be protected against any COVID infection, not just hospitalization, because of the long-term risk. 30% of people who get COVID have long-term complications, and 85% of people with long COVID had "mild" or "moderate" cases. Sign me up for whatever boosters are necessary to minimize the chance of infection.