Interesting, especially after experimenting with it for a few weeks. Most of it is great, still missing a few features (like multiple labels per message, and great keyboard shortcut support: now it’s very basic).
So read this that I got via Kristian Köhntopp:
Today, we release Inbox by Gmail – It’s been my main project since I joined Google. This ends the first chapter of a longer story!http://googleblog.blogspot.com/2014/10/an-inbox-that-works-for-you.html