Google Code Blog: Native Client: A Technology for Running Native Code on the Web: This’ll be interesting. It’s like the second coming of ActiveX.
Modern PCs can execute billions of instructions per second, but today’s web applications can access only a small fraction of this computational power. If web developers could use all of this power, just imagine the rich, dynamic experiences they could create.
Last year, people were talking about how to get Python or Ruby to execute in the browser, which I’m sure would give Microsoft a heart attack.
I normally think the “Web OS” concept is overblown, but this would bring it several steps closer to reality.