Yes, and other wristwatch devices (calculators, computers) haven't taken off. Even if it was self-contained. Perhaps many people don't like wearing watches. I d

Yes, and other wristwatch devices (calculators, computers) haven't taken off. Even if it was self-contained. Perhaps many people don't like wearing watches. I don't. A heads-up display seems much more useful and convenient, solving the shrinking-display problem.