I'd be willing to vote for this answer.
The World(tm) is not 'ready' for a generic wearable computer. However, wearable computers are 'ready' to be a thing. Part of your 'start the workday' routine will be to put on your enhanced reality glasses/goggles. These become the telephone headset for the call-center employee, the manual/blueprints for the maintenance or construction worker, the map for the delivery driver, and even the playbook for the football player.
Design/market Glass as a work tool that everyone uses every day because of its incredibly focused usefulness. Then, they won't be a weird thing for weird people, it'll be a familiar thing, and they'll want to use it all the time.