Just because you can do something doesn't mean you should. Example A: a snowboard with a big honkin' e-ink display on its nose.
As you can see, the snowboard features a big old compass, a clock, an altimeter, what appears to be a weather icon (just in case you weren't sure), and an email notification for some reason. Sure, you could get a watch that does all of this, but does a watch distract you while you're flying down an icy mountain? I didn't think so.