This post was actually a comment on Pebble. They do have some notification center like features and API available for developers, BUT they don't have Siri. And

This post was actually a comment on Pebble. They do have some notification center like features and API available for developers, BUT they don't have Siri. And Siri is big in my opinion. Setting reminders, notes, calendar events, and more just by talking into your watch! Pebble won't be able to access Apple's notes, reminders, and calendars apps. Although they could turn to google calendar as a solution, Apple's native apps are fully integrated with iOS devices. Lastly, Pebble doesn't have that kick-ass design that creates fanboys. It is nice that it supports both iOS and Android, but it is no competition if Google and Apple make their own much better version of smart watches. Hopefully Google won't cuz Android sucks ass. (Please don't start a flaming war on Android vs iOS. It was just a fanboy remark)