They seem pretty good about using the open specification. Also they're starting to phase out -webkit tags for experimental chrome only features. They're hidden

They seem pretty good about using the open specification. Also they're starting to phase out -webkit tags for experimental chrome only features. They're hidden behind flags so you basically can't use them in production unless it's endorsed as part of the spec. Not to derail but safari mobile is the real IE6, plus lock in so users can't even get away from it.