One day is a short amount of time.
Monitors:
The monitor "shootout" was one of the most informative parts of the day.
I sold my monitors and bought 8 SRX712m's because of what I heard
I also gained respect for Triple 8's in that "shootout"
Mics:
Might want to get a widely used / neutral set of moderately sized speakers and do the same thing with 10-20 mics in a row. Let people walk across them check 1 2 3 4 5 6 7 8 and see what they think.
Senn 835, 935, 945, Shure 58 B58 B87, B86, EV PLxxx, Audix OMxxx etc etc etc...
Big vs Small
I'm probably in the minority here. While I love seeing bigger stuff, the club sized stuff is what interests to me. The mini "line arrays" (VRX sized stuff) are as large as anything I would ever consider buying. Any bigger than that and it's just curiosity (it is fin though)
SMAART / Sys Arch / etc
These are time intensive subjects.
A day just for those subjects could be scheduled on a day before or after. There isn't time to get into those subjects if much gear gawking/drooling is to happen
I'll come if I can make it no matter how the day is laid out.
Just rambling about what would make it more interesting to me.