I've been using Microsoft account for years now. Starting when it was still "hotmail" until Microsoft has merged live.com, msn.com, and outlook.com into one Microsoft account. Through the years, I have seen a lot of improvements from security verification, interface, and now the New App Launcher.
Then New App launcher for outlook.com provides a single point access to Microsoft personal services you may use daily like People, Calendar, Onedrive and Office online.
Microsoft said that launching apps is now the same, whether you're using Office 365 at work, or attending to your personal life in Outlook.com; whether you are sharing a document from OneDrive, co-authoring a Word doc or Excel spreadsheet in your browser, or making a Skype call from Outlook.com.