it sounds really interesting for two-hand shooting (his and hers, his and hers.. grip). a real team-building machine
i do hope the weather sealed headphones will come soon to complete the line of weather sealed accesories (as everybody knows, your weather sealed equipment will be as sealed as the weakest point: the headphones, in this case, which regretably have no sealing, thus risking moisture infiltration by way of the photographers head)
the ultrasonic water-repelant is not such a bad idea, really. it did work in some all-terrain prototype made by renault long time ago (but than again, it had a 200horse power powerplant at least to suck energy from); it was used instead of windscreen whipers, if i remember correctly.
i see only one major flaw: i am ambidextrous, what will _i_ do?! i sure hope the buffer can handle shooting simultaneously from the two sensors/grips/eyes.. uh?