They didn't aim for DTD to be for out-of-towners really, but instead locals. If they have extra time, yeah sure Disney will push them there, but it's not the aim. Look at Rainforest Cafe for crying out loud, one in a park, another there. The WoD is there to allow locals to buy merchandise without heading into the parks. And many of the specialty stores replicate something inside the parks somewhere.
Disney tried to make this a destination place for locals, and even with PI's removal, it's still their goal. While I do not see an Apple Store moving into Virgin due to size, market, and placement, I can see something like a giant Toys-R-Us like in Times Square going in. Want to see the future of DTD? Look at CityWalk...