Conference calling

What do you want from a conference? Thought I’d ask the question given the announcement by Fespa UK and Vism of the new ‘Thrive in Print’ conference, which will take place in autumn 2020. We’ve all been to trade shows etc. where the talks are somewhat poorly attended. Is the problem with the actual programme, speakers, or with where/when the events take place? What would it take to get your bottom on a seat in the auditorium?