I wish I could tell you... I spent some much time in training and meetings that I only got 4-5 hours on the floor total over 3 days.  Because of this I didn't seek out and wait in line for the demos.

The only demo I saw was at the Sony booth for their 4K projection.  The projector was impressive, but not the audio.  I was hoping to have to opportunity to see a few high-end demos and just didn't get it done.