O3D
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O3D is an open-source JavaScript API for creating interactive 3D graphics applications that run in a browser window—games, ads, 3D model viewers, product demos, virtual worlds.
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At last! A major player like google tries to resurrect the idea of 3D in the web. Aeons ago I did some VRMLing which was a very fustrating experience; (for me, not my clients 
) Of course it supported javascript then too. It was a nightmare.
Anyway, maybe O3D does it. Several companies tried to establish a de facto standard for Web and 3D. I have the impression that none succeeded really.
At least google shows again a strong commitment to push the browser as platform and the importance of their Javascript engine which empowers Chome.
What is still missing (maybe someone can correct me here) is a standard API for audio. This will then eliminate Flash and establish even more Javascript as a systems language. In the meantime, it is still necessary to do some tricks like wrapping flash to acheive sound effects, native support would be great.