Other new features include:
New Accent colors, matching Windows Phone 8, bringing the total to 20 + 1
Bing Wallpaper of the day, which will auto-update your lockscreen image. Sadly developers to not have access to this, meaning we don’t expect 3rd party 7.8 apps to have this feature.
New boot screen with updated WIndows Phone logo
New Office logo, though OneNote is not a seperate app like in WP8
There is no Wi-Fi keep-alive feature, no SMS-call reject and Internet Explorer as far as we can tell is exactly the same. In addition, Office and Zune Music were not updated to either current version or with their rebranding.
The oddest thing is how AT&T opted to have the “look” of the 7.8 match 7.5, meaning on a fresh install you can’t even tell there are different Tile sizes. Users will essentially have to discover this new change on their own.