Barb Bowman,MVP has pointed out that Photos App in 8.1 preview loses many features:-
“I’ve just installed the 8.1 Preview on a desktop. The Photos App has changed:
1. No longer includes the ability to show images from Facebook, Flickr, SkyDrive
2. No longer allows images from other computers or the network – am guessing that because there is now support for SkyDrive on RT and MS is heavily emphasizing that as the preferred storage location (when you upgrade, one of the questions asked before you even get to the desktop is if you want to use SkyDrive as your default storage area – and that seems to be the default – and MS feels the network, NAS, Homegroup, and other computers are deprecated.
3. Does have some new editing features”