dropwizard looks very cool.
I believe more and more that Micro is talking to a specific audience, where the non-Java users have an important role too in the development of the site; Designers, Content managers, etc. With Micro they can prototype quickly before even calling for dev support. I am glad that when I compare Micro with similar frameworks, I realize how small Micro is:) And I truly like it this way. Sure Micro is lacking the persistence support for now (many other features too, probably) and it will be hard to compare it with other frameworks from this perspective. However, Micro is modular and can be expanded easily! (I am searching for a light ORM that I could add as an optional extension; activejdbc, maybe?)
Honestly, I see all the other similar frameworks as options, not as competitors. Let the users compare and choose based on what they want to accomplish. Maybe they'll use ... I don't know ... Play, to randomly pick one, for building an awesome e-comm web site, but would they use it for developing a .. blog, or a fast REST service front-end layer let's say?! The Ruby world is full with good examples where devs/designers are swinging between the fat Rails and the slimmer Sinatra/etc., shouldn't we be glad we can start doing the same in Java?
;)