There are lots of exciting new features rolling out in Safari 9.1 such as support for the
picture element, enhancements to the web inspector, CSS variables and gesture events for iOS. Although, what I’m most excited for is the OpenType support with properties such as
font-feature-settings and its variants like
font-variant-caps, all of which give us more fine-tuned control over typesetting.
You can play around with these new features in the OSX 10.11.4 and iOS 9.3 betas today.