There are important differences from flash. For example, built-in strong security from the ground up. Another example - open source. Another is performance - NaCl is near native speed, Flash (to the best of my knowledge) is not.
NaCl can actually interoperate with the DOM and JS quite well - there are examples in the SDK. It is not aimed solely at "disconnected rectangle"-like applications.
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There are important differences from flash. For example, built-in strong security from the ground up. Another example - open source. Another is performance - NaCl is near native speed, Flash (to the best of my knowledge) is not.
NaCl can actually interoperate with the DOM and JS quite well - there are examples in the SDK. It is not aimed solely at "disconnected rectangle"-like applications.