After the 20ish or minutes of silent reading, we give people ~5min to post their questions for all others to see in real-time. We then give people a set number of votes and the presenter goes through the list answering the questions in descending order of votes.
I was hesitant at first when they introduced this (since it felt like more red tape), but I've found it helps focus the discussion on the most important feedback while avoiding one person bikeshedding the discussion time right at the beginning.
Today the cutting edge of tech looks pretty mundane. It's usually software, which doesn't really translate to looking futuristic. If TV show makers go too far it looks like magic and stops being an achievable dream.
Essentially, the reason why making high quality "dreams of the future" hopeful TV shows doesn't happen any more is because hardware innovation stopped looking exciting. The brilliant thing is that happened because we actually have the hardware now, and that had taught us to be realistic about the (near term) future.