This is one thing that really upsets me, in this technologically-driven age we live in, why do tablets and smartphones not feature the ability to include multiple users? I'd love for my iPad to have a 'login screen', where I can select myself and have the iPad set out how I want. Then, if my wife, or a guest wanted to use it, they would use an appropriate account.
But, it looks like this might come to Android first, and I can't be anymore excited. According to a report from Android Police, "miles of code" for multiple user accounts has already been written into the Android source code. Better yet, it looks as if lock screen information, installed applications, running applications, application data, default applications, home screen widgets, accounts, syncing and language settings are already separated for multiple users.
Google supposedly began work on the multiple user account feature more than a year ago, and maybe this will be the selling point of Android 4.2 "Key Lime Pie".