Looks like it will be painful to get used to, but we said that about the QWERTY keyboard and look where we are today.
What's hard is adapting to entirely different layouts such as Dvorak (which, by the way, could probably increase autocorrect accuracy greatly).
If at some point an input method that is faster and more efficient than QWERTY gains real traction and is taught or exposed to our youth, I'd expect a shift away from what's become convention.
This is by no means something that will just happen overnight, but I'd be a little saddened if in the last years of my life, QWERTY remains as the dominant method of text input. It's certainly a good solution, but no where near an optimal one.