The App That’s Looking Out For You
The other new Bing app that comes standard with Windows 8.1 is called Health & Fitness. It offers a wealth of advice for watching your diet and taking care of your body. The app features exercise instructions and fitness videos, functions for tracking fitness goals as well as medical conditions and treatments, a ton of pharmacological reference information, and even interactive 3D maps of the human body.
Like the "reading list" or "read later" feature of some Web browsers, the Reading List app is a place to store things for later. Unlike similarly-named features in browsers, the Reading List app isn't simply for webpages, but just about anything from other Modern UI apps. The Reading List is basically a new unified destination for all kinds of things, and items can be added to the Reading List via the Share Charm.
Windows Store: The Grand Re-Opening
The Windows Store undergoes some remodeling for Windows 8.1. It now does a better job of finding the best and most useful applications. Instead of category-based organization, it offers multiple lists: Spotlight, Picks for you, Popular now, New Releases, Top Paid, and Top free. The lists can, however, be filtered by the old categories. For example, you can view only Games suggested for you, or only the most popular paid Productivity apps.
Xbox Music: The Remix
The Xbox Music app in Windows 8.1 is entirely rewritten. It now gives priority to the music in your library rather than to online services. Online services are still present though, along with the automatic compilation function. In addition, there’s now a Radio feature that automatically creates “stations” for you with music based on your tastes.
The Xbox Video app is also redesigned to be simpler and easier to navigate.
Photorealistic 3D Maps
Even though it’s not part of the Preview version, the Windows 8.1 Map app should be much more evolved than the Windows 8 implementation. It's expected to have extensive search functions and personalized suggestions, voice support, trivia, and most of all, 3D displays of certain cities.
Modern UI Video Editing
A new app called Movie Moments is intended to be the Modern UI equivalent of Movie Maker. Although it isn't standard in the Preview, Movie Moments could be available soon in the Windows Store. The app lets you trim and assemble sequences, add music, and add text.