I'm one tinfoil hat away from believing this isn't just about discontinuing unprofitable products, but a concerted effort to kill off support for open standards (RSS, CalDAV, what's next?) and turning the Google universe into a Facebook/Apple style walled garden called Google+. Evil plan or not, the days of Google as the champion of the open web are over.
That ship sailed a long time ago. I see it as when they gave up on Friend Connect / OpenSocial as when they sort of gave up on the idea of open-first, and instead started focusing it competing feature-for-feature. Mozilla is the champion of the open web these days. Google started their proprietary NaCl and Dart projects because they claimed you couldn't make JavaScript any faster than it currently is. And now Mozilla…
Something similar could be said about Dart, but there the language itself is not so interesting (merely not insane). The VM is potentially the language-independent bytecode and stdlib in a browser we've all been waiting for.
While Google have been behavin evil-ly lately, in particular related to Google+, NaCl and Dart are not examples of this.