If flash crashes, it only crashes out one tab. That's the killer feature for me with chrome.
The only problem is I don't remember Flash or FF crashing before, except some rare occasion. Now I see Flash crashes somewhat often.
In every tab, all flash elements become gray. I'd rather just one tab crash that parts of many tabs crashing.
Note: Firefox used to crash the entire browser when Flash crashed so the method that Chrome and Firefox now use is an improvement.