Not trying to offend you, but have you had your hands on one yet? I don't think you can say this until you do. It may be crap. Well, it's Apple, so it's probably not crap, but maybe it actually won't make a <i>huge</i> difference.
It's the first time we get a new interaction idiom since 2007 really. I think it will bring great changes and improvements to mobile app UIs. Adaption gonna take a while though, 2-3 years for it to be considered standard on iOS, another 1-2 years on Android, I'd guess. Also given it's from Apple the implementation will probably be rather solid.
They already have it implemented in their watch and latest-gen trackpads, so there's that.