We have some good news for you — Jay Freeman, aka saurik has just updated WinterBoard with support for iOS 7 and iPhone 5s’ 64-bit processor.
While WinterBoard 0.9.3912 adds support for iOS 7, saurik notes that Wallpapers are not supported:
Wallpaper (whether png, html, or any of the other crazy formats that I should never have added to WinterBoard) is not currently supported on iOS 7 :(.
Please be patient: there is a lot to fix.
WinterBoard 0.9.3912 (just released) runs on iOS 7 and seems compatible with ARM64; theme artists are encouraged to report any crashes/bugs.
— Jay Freeman (saurik) (@saurik) January 12, 2014
Along with the compatibility fixes, the WinterBoard icon has also been redesigned, in line with the iOS 7 flat design language:
saurik had earlier said that WinterBoard won’t get updated for iOS 7 unless the theming community starts contributing, but thankfully, he seems to have gathered community support.
Please note that although WinterBoard itself has been updated, themes will probably need to updated, and even if they’re updated for the latest version, there might be some crashes or bugs.