A longstanding conspiracy is the tale of how Facebook is listening in on your conversations, but the way it is actually serving you ads is much more unsettling.
I think for marketing purposes you could have a hot list of marketing terms (presumably these would be scarce so sold to high bidding companies) and match against those which would be a sort of middle ground between the general purpose processing and a single wake word.
You could do it in a cheap (in terms of energy) and sloppy way where it only needs to be correct most of the time of the time to have a net positive impact on ad targeting when reconciled with other user data.
I think for marketing purposes you could have a hot list of marketing terms (presumably these would be scarce so sold to high bidding companies) and match against those which would be a sort of middle ground between the general purpose processing and a single wake word.
You could do it in a cheap (in terms of energy) and sloppy way where it only needs to be correct most of the time of the time to have a net positive impact on ad targeting when reconciled with other user data.