So, you've taken up running.
Apple Watch has taken up a few new things as well.
First, it tracked your distance.
Now, it's tracking your stride length.
It learns your favorite route, then lets you race against yourself.
Siri: You're behind.
Yeah, you're behind.
When you're swimming, it can tell a breaststroke from a backstroke, from a kickboard.
And when you're done, it dries itself off.
This isn't a dream; your watch can take an ECG. But if it was a dream, that watch would track your REM sleep down to the minute.
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