I think it's safe to say there is a large portion of the population that will continue not eating indoors until they are vaccinated, or the infection numbers in their area go down significantly. I can't find articles to back it up, but I have read from restaurant owners saying that even when they were allowed to expand their indoor capacity, they were never hitting that limit.

With that said, this is going to vary by region. There is absolutely a large percentage of people wanting and willing to go eat indoors at restaurants right now, I just don't think that number represents a majority.