1. The print preview page now integrates with Cloud Print. That means you can now print any webpage or PDF file using Cloud Print.
While Cloud Print makes more sense on a mobile phone or a tablet, you can also use it on your computer. The printer management page lets you share printers with your contacts just like you would share files in Google Docs. You're no longer limited to sharing a printer with other computers on the same network.
2. Chrome now has an interface for creating profiles. Go to Options > Personal Stuff and click "Add new user". After creating a new profile, Google asks you to log in using a Google Account and sync your settings and data, but this is optional. You can change the profile name and the icon that's always displayed in the top-left corner of the window. Profiles work just like the incognito mode, except that the data is saved and you can use multiple profiles at the same time. Just click the profile icon and you can open a new window in a different profile.
It's important to keep in mind that profiles can't be password-protected and they aren't intended to replace the user accounts from your operating system. Profiles are useful if you need different settings, bookmarks, apps at work, at school or in your past time. You can create a profile for games, install your favorite games from the Chrome Web Store, download a game-related theme and add some bookmarks.
3. YouTube, Gmail and Google Search are the apps that are automatically added when you install Chrome or create a new profile. The Search app was about to be removed because the icon was ugly.
{ Thanks, Abhishek. }