Isn't Games Lockscreen also do this?There is one pretty cool app called lockmix. It lets you to chose gallery in the phone, bing images etc. Also lets you put agenda on the lock screen, weather etc. It's pretty cool, even though some functions have to be paid
Notice the text describing the picture is Portrait.
Someone asked him in the comments if there'll be also Landscape orientation, he just said
"Yes."
Sooo..that's cool, I guess. If it's true.