It seems to take strengths from Google's email aggregation prowess + Mailbox-like functionality + Google Now integration. A smart play but yeah it's going to look very derivative in light of how awesome Mailbox already is at tackling the majority of the issues with email maintenance.

Yeah, but it's possible many folks trust Google and don't trust Dropbox (or haven't even heard of Mailbox) so it's interesting for Google to access that untapped market.

The gmail app has had the swipe to archive thing for a while now.

That's exactly what I thought. Was wondering if Google acquired Mailbox app!

Dropbox did.

That's exactly my first thought. The only differentiating feature mentioned in the video from what I could gather was an indicator of importance that the app determines.

Mailbox was acquired by Dropbox some time ago.

I don't get more than maybe 10 emails a day on my personal account. Mailbox makes it fun to take care of them. I don't see myself needing anything more complex.

This looks very much like the end of Mailbox. If execution is half-decent (and it's a big "if", I haven't tried it yet), GMail users from now on will have no use for Mailbox or MailPilot.