Gnome 3.8 is currently in active development phase and a few features planned earlier are being implemented. One of the Gnome developers, Debarshi Ray has posted some screenshots of awesome work he has done with Gnome lately. Like you can now add IMAP/SMTP accounts directly to Gnome Online Accounts via its single sign-on dialog, and integrate all email clients to use them. Best still, Evolution has already been integrated and you will no longer need to separately add accounts in Evolution to receive your mail.
OwnCloud integration, which had been one of the top priorities of Gnome 3.8 is quite ready now. Now you can add your OwnCloud installation by just going to Online Accounts panel and have everything synced between your PC and cloud. Better still, it's not just about files, but also calendar and contacts. Your OwnCloud installation will appear as a separate drive in Nautilus where you can drag and drop to upload and share your files.
You can read the blog post here.