Here's the new look across the four major platforms — far from a "WebKit monoculture", I'd say.
* May move to Servo
** May move to Servo on Samsung devices
*** Will move to Blink if and when Apple allows 3rd party engines
A few notes:
- Opera's recent move away from Presto was not to WebKit, but to Chromium, so they're moving to Blink as well (confirmed by Bruce Lawson).
- With Chrome and Opera moving to Blink and Safari being retired, there soon won't be a WebKit browser on Windows (pointed out by David Storey).
- Blink will not use vendor prefixes, except existing
-webkit-ones that will be phased out as their features mature. This is great news.