It's come a long way. I was aware of Codenvy years ago and recently became aware that they seem to have joined the Eclipse Che effort.

The main thing missing from Che, for me, was a lot of nice, easy plugins to deploy to cloud services. You can run your app in the container very easily, but it would be nice to be able to push to, say, Heroku right from the IDE.

Apparently Red Hat have acquired Codenvy now, so it will be interesting to see if they add some integration for OpenShift (their own repackaged Kubernetes).