Earlier quoted context omitted.
Then you missed a cogent argument: "If you have a phone in your pocket, why wear this? And it doesn’t seem to replace the need to carry a phone."
You may want to ask the 70,000 people who put money into the Pebble smartwatch Kickstarter... http://www.kickstarter.com/projects/597507018/pebble-e-paper... Here are the arguments Tog makes for an "iWatch": http://asktog.com/atc/apple-iwatch/
(for what its worth, Gruber backed the Pebble on Kickstarter: http://daringfireball.net/linked/2012/04/23/pebble-watch )