With the support of Gnome fallback going away and users backlashing to quit Gnome, developers have decided to create a separate session for those users who like old style desktop. This session, known as Gnome legacy as now, will be able to retain some design of Gnome 2.x - like drop down menus, minimize and maximize buttons and more. Gnome 3.8 will be the first release without the fallback mode, but you will be able to switch to Gnome legacy from the GDM login screen.
Minimize and maximize buttons have been added via an extension, and support for classic Alt-Tab is also planned. Also, some new things that we have covered earlier like configurable shell search, new privacy settings, notification filtering and power panel has also been added.
Gnome 3.8 will come with a brand new app called Gnome Photos for all your needs. Here is a nice screenshot of the same.