We're not sure if these are legit or not but it's not exactly something very far fetched. The idea of adding an orientation lock to phones is a pretty standard one, adding convenience when laying down in bed or if you just don't use your device that way. The method seems simple enough: bring down the volume bar, tap the icon to lock/unlock screen orienation.
These images come reportedly from someone's Facebook page and if real, would be from a newer build of the OS we haven't see yet. On the other hand, they could also be clever concepts, so take 'em with a grain of salt because we probably won't see this anytime soon. Cool idea though.
Thanks, anonymous, for the tip!