> still native client is open source and could easily be integrated into every brother, just like chrome does it. This would eliminate the need for every other plugin.

First of all, being open source doesn't mean it is easy to integrate, either technically or otherwise (by otherwise, I mean that other browser makers have principles that determine what technology makes sense to put in their browser, and NaCl does not necessarily pass them).

Second, how would this eliminate the need for every other plugin? Chrome has NaCl but it still has Flash.