The only commercial panel speaker I saw at the show was the GT Audio planar magnetic/ribbon speaker. It sounded decent, particularly with price factored in, but, it was not that memorable. The other panel speaker I heard was a DIY full range electrostatic that DID sound quite good, even with somewhat limited bass response, but this was not a commercially available product.
Another interesting thing on display was the QOL processor. I was expecting to hear the kind of "special effects" of other processors that inject phase shifted signals to boost the size of the soundfield, but, what I did get to hear was much more subtle. It added just a touch of additional soundstage width, but mainly, it added a bit more feeling of being immersed in a complete sonic environment (less of the feeling of sound only coming from the speakers and front of the room). It did not significantly alter the tonal balance, not something that can be said about some other processors/ambience recovery devices. I did not hear it long enough to detect any major problems (nor was I really listening for such). In short, it is something I found worth seriously auditioning.
Another interesting thing on display was the QOL processor. I was expecting to hear the kind of "special effects" of other processors that inject phase shifted signals to boost the size of the soundfield, but, what I did get to hear was much more subtle. It added just a touch of additional soundstage width, but mainly, it added a bit more feeling of being immersed in a complete sonic environment (less of the feeling of sound only coming from the speakers and front of the room). It did not significantly alter the tonal balance, not something that can be said about some other processors/ambience recovery devices. I did not hear it long enough to detect any major problems (nor was I really listening for such). In short, it is something I found worth seriously auditioning.