This is a demo that demonstrates the potential of rendering 3D graphics in the browser, using O3D, an open-source web API for creating rich, interactive 3D applications in the browser. The app shown in the video is coded in javascript and html and runs in a web browser.
So we did not have 3d in a browser before?
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Good. Since its open source, me might see some real implementation of this in near future, in our respective favourite browsers.