[vizeroth]

There's nothing convenient about corrective lenses, especially if you are far-sighted or need bifocals and are driving. This is also why the portion of the video that mentioned the GPS also mentioned the speedometer.

However, until it is universally installed in cars and easily adjusted for your personal needs when moving from car to car, I doubt many people will be throwing away their bi/tri-focals in favor of lenses for distance only.