The shortcomings were quite obvious
The display which turned off to save battery. The display which didn't work in strong glare. The battery which could barely last a day or two. The constant bother of charging. The proprietary chargers and accessories. The lack of compelling apps. The proprietary protocols and ties to phone platforms. The cost. etc.
All these things sunk smart watches. At the end of the day a "smart" watch was just a normal watch which didn't tell the as well as a normal watch and was considerably more bother to use.
When smart watches make substantial progress on all of the issues above, then they may get some market traction.
Biting the hand that feeds IT
