The store-within-a-store concept is just not the same experience as an Apple Store and diminishes the brand. Apple products sell for a premium partly because the entire ownership experience is great and it starts at the store.
I get that everyone does not have a nearby Apple Store but I do not think this is the answer. Remember CompUSA? Think about Best Buy. The last time I was looking at something I planned to order from Amazon, I overheard a salesperson steering a customer away from the Mac store toward the PC store with blatant disinformation. Half the Mac's were off, the area was a bit cluttered, etc. I like Target, but without Apple employees full-time, the experience will suck.