Just wondering if you can integrate your contacts with their social media photo (Facebook/twitter) to see them when they call without taking a pic? I don't use Google+ so that's not an option.
Yup, from Google+ and Facebook as long as you add your accounts to the phone and select to sync contacts. You can also sync pictures and events with Facebook.
TouchWiz is like Windows Explorer - it's the "desktop". Social integration is done between apps, not with the launcher (which is the generic term for the app that provides the desktop in Android).