like webGL or even maybe to export to format that does not need to install any plugins?
Not likely. WebGL and managed code can’t compare even remotely to the speed of the native side of the engine. The native elements of the engine are all in the plugin and give it it’s performance. To get it working entirely plugin-less on most browsers (excepting Chrome with NACL) would result in an incredibly large performance loss.
They talked about Google building it in chrome.
Yeah, Unity actually already works with NACL, as Google was demoing it when announcing NACL. Chrome is designed to double as a super lightweight OS, and so they are developing a sort of native code sandbox. Hopefully other browsers follow suit, in which case plugins would become a thing of the past, although game download size would increase because of it.
so webGL cant be compared with unity plugin regarding performance? that is good to hear