Turn by turn directions, multitasking, tethering, OTA streaming of any music you've purchased, total phone back up including apps and data, you were saying?
Also, just because Google said Android can do it, doesn't mean carriers are going to let manufacturers enable that feature on the phone. Odds are, to enable WiFi tethering in production model phones, you will either have to a) Pay more or b) root your phone, sideload an app/firmware.