What we knew had to happen—BGR reports the first sighting of Wi-Fi Hotspot capability coming to Apple’s iPhone in iOS 4.3:
According to our source, the personal hotspot feature that debuted on the Verizon iPhone yesterday will, in fact, be making its way to all iPhones in iOS 4.3. We’re sure there will need to be carrier support for this feature, and for AT&T users it is entirely possible we might not see this right away. For those of you with more lenient carriers, however, we are sure you will be pleased to learn that you’ll be able to connect up to five devices over Wi-Fi to the iPhone’s cellular data connection.
Why not just build-in 3G/4G support in MacBook models?