Unfortunately this is an anti-feature: no one will choose a browser for himself b/c he wants it, and some ppl might avoid browsers with it.

I guess the only way it could be good for market share is I might want to install a browser like this for someone else, so they'll end up upgrading eventually even if I'm not around anymore. I'd be happy to mass install it at a big company if I could get away with it. Then even if I'm not there later, something good will happen.