I ended up sending a support email to the Unity plugin team asking about it
and this is what I got:
"You'll be pleased to hear that Unity has supported Native Client as a build
target since the introduction of v3.5, so it is already possible for
developers to deploy to this platform (and it does work on Linux). However,
there are no plans for a Native Client app that can run existing webplayers -
the developers of the game must rebuild and release for Native Client. We're
hoping that more developers will take advantage of this as they become aware
of it and as Chrome gains in userbase."
So in a nutshell the tools are there to make these games native in the web
browser but it is up to the developers and Disney to flip that switch. What
are the odds that we see that happening soon? lol