Cute option, especially for personalized home screen art I can see that as being a fun choice to have available. My own lock screen is a shot of a bricked up, iron barred window. (shot from a section of the NYC High Line)... A whimsical bit of "extra" security.
OTOH "Screensaver"? Just a more aesthetic choice for securing my work machine when I'm away from it. "Sleep" has the black screen, "screensaver" and there's an appealing (perhaps) graphic instead.