well you know I (see the I person, meaing ME?) find it useless, just like I find Bag mods forexample useless to. The default bags are good enough for me, put in a sorting addon ant it does wonders.
Changing the backgrounds of various panels adds nothing to my gaming experience.
All is personnel and I do know that alot of people DO find addons like that usefull, which is more then fine for me.