If they want us to take any of these new corporate languages seriously, they should kill off some existing language support. A strong signal that (for example) Dart was definitively the next glue language at Google would be to end support for Python in everything like GWT etc.
I just recently came out of a "dark place" on a project. I had written and re-written this application perhaps 10+ times! At one point I started writing down the principles or rules I was breaking, that were causing these re-writes. Here's what I came up with.