I expected iOS 4.3 or the iPad 2 to bring the personal hotspot feature to the iPad but was surprised to see it's limited only to the iPhone 4. Why is that? AT&T and Verizon only stand to gain if people feel an incentive to get an iPad data plan (plus the hotspot service). As much as the Apple ecosystem works smoothly, not all iPad owners have an iPhone 4 and will use it to tether their iPads to the internet.