Agree, there will be significant impetus for people to upgrade...

Agree, there will be significant impetus for people to upgrade old speaker systems in a similar manner to what happened when flat screen tvs were introduced.  Due to supply constraints over the initial few years the types of systems/devices that will be changed first will be the ones where the highest $$ margin exists.  First cab off the rank might actually be audio systems designed for high end luxury cars, and once that's saturated then more general high end home and car audio might be next to be saturated, and so on down the margin chain.  Reckon akp will be sold prior to them being used for phones.