I greatly doubt it. Everybody already had a cellphone in 2007, and Apple pricing it at $200 with carrier subsidies tipped the scales in its favour when it came to rapid adoption. There are no such discounts likely with their headset; the estimates say it will be $1500 minimum. And unlike a phone, a headset is not an essential device that goes with you wherever. So it won't create the same kind of excitement the iPhone did.