Class D is still in it's infancy, and digital audio in general has more or less become the mainstream of the times. It will only improve, becoming smaller, lighter, more powerful, and able to leap over tall sampling rates without even a bound....
Esoteria will continue to exist, as the 'cutting edge' of now becomes the 'vintage' of tomorrow. But that's the way of all things; if it's not growing, it's dying...
Audio shows will start to look like the computer shows of today. My only hope is that the exhibitors can have spaces that are acoustically isolated from each other and the halls that serve them.
Shows still sound like walking through a massive cage of excited canaries, each singing different tunes....physically and mentally tiring in a way that's not typical, no....