What the hell are you talking about? WiFi is many times faster than Bluetooth, not to mention better on battery life (I think), is already set up for a home network in the hypothetical example, and has much better range (you could start syning when you walk in the door, not when and if you are in range for Bluetooth) Have you ever tried sending even ONE song over bluetooth? Let alone syncing 8-16GB worth?
Right.
Because Apple is known for testing the waters by using the fastest protocols immediately, right out of the gate... Like choosing....edge over 3G.
Wifi's current throughput is only faster because it's expected to operate at longer ranges. This is precisely why Bluetooth radios are more efficient and consume less power.
As for speed, if apple were to implement Bluetooth 3.0, it would leave wifi-N in the dust.
Besides, BLuetooth radios CAN work at ranges that would allow you to sync when you walk in the door.
Now why you'de think it necessary to sync while standing across the street or halfway down the block with wifi..... ??
But what the hell I was really talking about was that bluetooth was implemented as a wireless replacement for cords, while wifi was created as a wireless replacement for conventional Ethernet networking. This in itself makes Bluetooth the logical choice for wireless syncing.
iPhone USB cable = cable
iPhone USB cable != Cat5 network