Very interesting discussion. I think the future of Hot AC will depend, to some extent, on the trends of its format neighbors, (mainstream) AC and (mainstream) CHR. As AC tries to get younger, it is encroaching on Hot AC's territory, playing more upbeat songs from the "hip" artists and less of the soft stuff. On the other hand, CHR seems to be going back to its roots, playing a wider variety of hits, not just the rhythmic ones. This leaves less room for Hot AC to work and distinguish itself from mainstream AC and CHR. I believe, in their struggles to find their identities, Hot AC will split into three distinct styles: modern, mainstream and rhythmic. It is kind of that way already except that modern and rhythmic AC's are not nearly as prevalent as the mainstream version right now.