>All this means is we'll have to go back to the old ways of sniffing out browsers, and I fail to see how that's better.
The situation is no different just now, because -webkit- applies to Safari, Opera and many mobile browsers, not just Chrome. :/
>Nor do I look forward to a deluge of websites prompting me to fiddle with a config to "get the full experience". Most web developers have very little sway when marketing or clients demand certain things, and this is likely to be something they demand.
"Use a modern browser [actually, Chrome] to get the full experience" is not an uncommon sight these days.