Luke Wroblewski (who, by the way, is worth a follow on social media and on his blog) talked about Redesigning the Apple Watch UI:
When wearing an Android Wear smartwatch, I found myself keeping up with more than I do when wearing the Apple Watch. A simple scroll up on Wear would give me the latest content from several apps ordered by relevance. In their current state, Glances on the Apple Watch don’t give me that lightweight way of staying on top of the information I care about. Their inclusion in the Apple Watch interaction model seems, instead, to complicate moving between tasks (and apps).
Some great suggestions on ways to make the Apple Watch a platform to more easily keep up with notifications, especially the ones you care about. I agree with him that 3rd party complications will help with this when watchOS 2 is released.