更新內容：
Update 3
OS version: 8.0.10501.127 or 8.0.10512.142*
Accessibility. We've made several improvements for customers who are visually impaired.
輔助功能 – 改進弱視用戶的手機使用體驗
Storage. Now you can easily free up storage space on your phone and manage temporary files. New categories show what's taking up space.
存儲 – 可簡單清理存儲空間、管理臨時分揀、顯示空間使用情況
Driving Mode. Feeling distracted behind the wheel? Driving Mode allows you to minimize incoming calls and text messages to help you focus on the road.
駕駛模式 – 最小化來電和短信提醒的干擾，並自動發送短信告知對方
Screen. Reading emails in bed? You can lock your screen orientation so it doesn't shift when you move your phone around.
屏幕旋轉鎖定 – 設置 > 屏幕旋轉
Wi-Fi. Start preserving cellular data on your phone right out of the box—you can now connect to Wi-Fi during set up.
安裝初始化時可連接 Wi-Fi
Internet sharing. Now you can use your phone’s cellular data connection from your Microsoft Windows 8.1 devices by pairing them over Bluetooth.
Internet 共享 – 通過藍牙配對 Windows 8.1 設備共享 Internet 聯網
Bluetooth. Several fixes were made to address known issues, and improvements were made to connection quality for Bluetooth accessories.
藍牙 – 修復幾個已知問題，改進藍牙配件的連接質量
Ringtones. Do more with ringtones now. Assign ringtones for text messages, so you'll know who's texting you without even looking. Use your custom ringtones for more things—text messages, instant messages, emails, voicemail, and reminders.
更多鈴聲設置 – 短信、電子郵件、語音郵件、提醒的鈴聲設置
App switcher. Don't look back. Now you can use the App switcher to quickly close apps when you're finished with them.
應用切換器 – 多任務管理提供方便的應用關閉按鈕
Other improvements. Includes many other improvements to Windows Phone.
其他改進 – Windows Phone 的其他改進
*Your update version number depends on your specific phone model and mobile operator.
參考：http://www.windowsphone.com/en-US/how-to/wp8/basics/windows-phone-8-update-history?signin=true
借圖：
個人感覺 屏幕旋轉和多任務管理器最有用了。
另外還以一項重要的更新就是支持1080全高清分辨率了親~
兩款支持1080的設置 Lumia 1520 和 1320
回到開發者關注的問題上來， 此次更新對開發有什么影響呢？
答案：暫時木有！
通過查閱MSDN介紹
1080 和 720P 分辨率在 ScaleFactor 函數返回值都會是1.5，所以我們的應用不會受到此次更新的影響。