I love this cool experimenting that Apple is doing, even though there probably won't ever be widespread real-world use (unless developing specifically for Safari).
Are you kidding? This will be available on a massive actively-used and well-differentiated install base: every iPhone, Android, and Pre device.
Though it's kind of depressing that it's easier to get people to sign 2-year $2000 mobile contracts to get decent phones than it is to get them to just stop using IE for normal browsing.
