Microsoft is rolling out a big update to Outlook.com that includes an overhaul to the interface alongside integration with a bunch of services that add in additional features. The new coat of paint is probably familiar if you've used the Office 365 or Windows 10 versions of Outlook. It's not altogether different from the old interface, but the redesign makes room for all the new features. For example, you can now edit Office docs right in your email, add GIFs from Giphy, toss a Yelp review into an email, instantly add tasks to Wunderlist and easily pull up Skype right in Outlook. Compared to the older interface, there's a heck of a lot more going on here and subsequently it comes off as cluttered, but it seems like most of the new features are optional.
As far as actual email management is concerned, Outlook now supports in-line replies, adds in a "mentions" to tag people and features a new pin system to help with organisation. Head over to the Office Blog for a big list of all the new stuff.
Outlook.com -- out of preview and better than ever [Office Blogs]