Nolan, I'm not familiar with what you do or have done, but have you ever tried to make a website back in the day? Ever tried to support IE6? 7? 8? IE literally broke the web. CSS rules which worked in every browser ever wouldn't work in IE. Entire webpages weren't formatting correctly, having to spend hours, days, on workarounds. Comparing Safari to IE is just wrong. Safari doesn't break the web, it 'just' lacks supp…
In the same vain, Chrome does break web by introducing various custom features that can't be found in other browsers. See all those Google demos from past several years: "You need Chrome to view this" sounds very much like those "IE5+" warnings.
I'm in sympathy with the spirit of this post, but I'm not sure that I agree with this specific example. I think that there's a big difference between an 'everyday' web page requiring a specific browser, and the creator of a browser showing off what they see as its exceptional capabilities.
However much designers (and users) like adherence to standards, I think that it's clear that a lot of the innovations we take for granted have come from browsers leading the way; and there's not much point in having those innovations in the browser if the user doesn't know about them.
(I should be clear that I'm not advocating a functionality free-for-all, though; probably much more harm than good has come from this behaviour.)