Lock screen wallpapers

I'm sure some people have noticed a recent trend on Pixiv where artists have been making iPhone wallpapers for the lock screen that make it look as though characters are on the other side of the glass.

Some examples:
post #1594456
post #1596044
post #1597915

I'm wondering if we should make a tag or a pool for these, since they seem to be growing in popularity.

someone already started using phone_screen and phone_wallpaper.

an alternative is against_glass fourth_wall search. the first page give the desired result.