Is this about replacing one monopoly with another? It is slowly starting too look like in the early 00's, most developers are starting to support only chrome, with no testing in Firefox or latest IE. On Android it is even worse, no one is testing with Firefox Mobile (Fennec) - this is WinXP-IE6 all over again.
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.