I had a "smart watch" at one point...a Fossil Abacus WristPDA, which actually ran Palm OS 4.0 and had 8 Mb of storage, a fair amount for a Palm device. It was

I had a "smart watch" at one point...a Fossil Abacus WristPDA, which actually ran Palm OS 4.0 and had 8 Mb of storage, a fair amount for a Palm device. It was cool, but certainly not as usable as a regular Palm PDA...but you can probably guess what its main issue was: Battery life. The thing sucked down energy like an eight-armed alcoholic, and had to be plugged into the charger every night to avoid dying and completely losing the current time (something you never want to have happen in a watch, and which brings to mind the "You had ONE JOB" meme). And the only way to charge it was with its special USB cable that had an add-on wall wart power supply. (It also had one of those black rubber watchbands, custom-designed for the watch, with storage for its tiny stylus in the buckle. And, when the band cracked and broke, as those kind of bands inevitably do for me, there was no way to replace it.) When I got my first iPhone, that watch was one of the three gadgets it replaced. I'm not convinced its modern-day counterparts would work out any better.