There appears to be some confusion about which was actually demo'd in the keynote, but either way the currently publicly available one is a plugin, and NaCl itself isn't HTML5 or a web standard even by the fuzzy definitions generally thrown around. It's still interesting tech though.
I know there is a unity plugin for browser, but the one being used at Google IO was running on NaCl (unless they lied about it), I don't know if it's already available or not to the general public. NaCl is not HTML5 but it's possible that the piss of bytecode is stored into the browser using HTML5 local storage so that you don't need to redownload the whole game every time you use it, just a guess though.
I know there is a unity plugin for browser, but they said at Google IO that it would run on NaCl, I don't know if it's already available or not to the general public. NaCl is not HTML5 but it's possible that the peace of bytecode is stored into the browser using HTML5 local storage so that you don't need to redownload the whole game every time you use it, just a guess though.
There is also currently experimental support for Unity running in NaCl instead.
http://blogs.unity3d.com/2010/05/19/google-android-and-the-f...
There appears to be some confusion about which was actually demo'd in the keynote, but either way the currently publicly available one is a plugin, and NaCl itself isn't HTML5 or a web standard even by the fuzzy definitions generally thrown around. It's still interesting tech though.