Rumors are afoot that a forthcoming iOS 4.3 update will bring the just announced Verizon iPhone's Wi-Fi Personal Hotspot feature to the GSM (AT&T) iPhone 4 as well. Personal Hotspot, as shown off on the Verizon iPhone running iOS 4.3.5, lets you share your phone's 3G connection with up to 5 other devices over Wi-Fi (like an iPod touch or iPad). Current tethering only allows 1 other device to share access over Bluetooth or USB.
However, not all carriers may choose to offer Wi-Fi Personal Hotspot even though Apple makes it available -- AT&T famously took a year longer than most other carriers to offer regular tethering. Even if carriers do choose to offer it, there's no word yet on what kind of extra fees, if any, will be levied for the privilege, though upwards of $20 a month wouldn't be surprising.
Also, Wi-Fi Personal Hotspot will no doubt put a dent in iPhone 4 battery life as it does on other devices that already support the feature.
What do you think, will your carrier choose to carry it?