New faces/Rising stars/Gimme5 slots at conferences are becoming more and more popular give a platform to gain experience and be heard by a wide audience. But is there draw backs to this format. Is this what a conference attendees are looking for?
Absolutely should be a part of conferences - moreso than it is now. New speakers need to be fostered, but they won't be the ones selling conference tickets to begin with until they get a little more experience.
It's the same as being a musician. You start out playing small local gigs, first on stage while the audience isn't really listening. As you get better and you get more experience, you get bigger gigs, and you move up the running order - until eventually you're the one headlining and selling the tickets.
One trend that's very common in performing arts (eg. Standup comedy) and music - is that the headline acts are frequently invited to choose their support acts. Personally, I'd love to see this tried at conferences.