Use case of: "VPN authentication notification" coming through that I want to approve, and when I have the Apple Watch on my wrist, it's actively _harder_ to use both the phone and the wrist version of it.
Don't get me started on the screen and use of detailed touch in an area that it quite literally the size of two thumbs.
Pebble: "Back" => "Up, Select, Down" ... glorious utility! Nobody wants to make e-paper (ahem: transflective) watches, and they all want to make touch screens the mechanism for interaction. Ugh!