Yeah, according to launchpad.net for example, one of the loudest desktop bug in ubuntu
development distro is the flash problem (crashes the while webbrowser). In a sandbox, plugin
would not be able to crash the whole browser and of course you would be able to enhance the
security as well with applying verious restrictions to it, eg like my current solution where
flash plugin is runned by nspluginwrapper even on 32 bit machine, it does the "browser crash
protection" and also since plugin is running another process it does not slow down the whole
browser and even cause better utilizition of multiple CPUs/cores of current desktops ...