WinPhoneViet has been sent some more leaked screen shots. We can of course not vouch for the veracity of the pictures, but they look authentic enough.
The Kids Corner one appears to suggest that users will be able to switch off the password required to access Kids Corner, which would be useful, as the current implementation requires one to unlock one’s handset before a child could get access to Kids Corner, which does rather make a joke of the implementation.
WinPhoneViet’s source also states that Windows Phone 8.1 will feature new hard button functionality:
Long Start = CORTANA (voice assistant)
double Start = What is going on in area ?!
double Back = ends current app
We will have to wait and see which of these features will eventually end up in the final build of the software, but at the very least it seems Windows Phone 8.1 will have many more features than the .1 update label suggests.