The strategy Google proposes in the email is two-pronged:
The email also mentiones Google Cloud IDE, called Brightly but does not go into any details on that.
Summasummarum: This is very interesting development. For Google the browser truly is the new operating system. For very long time Google has been betting on the browser becoming the defacto runtime environment for “desktop apps”, almost ignoring technologies like Java applets and Adobe Flash. Now this strategy seems to be paying of and with Dart they are taking this much further. It is also interesting to see how they are now against Microsoft on multiple fronts. Application development tools and developer support has traditionally been the strong point for Microsoft and it has probably helped them in keeping Windows marketshare high. Now Microsoft is struggling to create a strategy for applications running on browser and Google is challenging them with its own cloud platform and development tools.