I honestly don't know why it takes Walmart so long to switch over. I live in Atlanta and I've seen one that has it... And another a few miles away not. I've never used the new layout, but the old one sucks.
I was there to pick up photos (thus store has online pickup and photos at the same place)... They screwed up my order and I waited 45 minutes and left empty handed because no one there knew how to make a photo calendar and doesn't k know where mine went. But I digress.
I basically witnessed 45 minutes of a train wreck of people trying to pick up orders (probably Christmas presents) from a disorganized and understaffed center. No one was happy...
Your store should switch over to the new system sometime soon.