Right now in the sound settings for audio emitters we can set the sound they play and the loudness.
It would be great if under audio settings there was a choice of "loop sound" or "trigger on collision". This would add a bit of life to the scene. Right now our only interactions with objects are physical collisions so it would be nice if collisions did something.
disclaimer: I understand you guys don't want to add a bunch of stuff that would have to be "legacy"-ed and grandfathered later on. I am guessing you have tons of interactions planned.