Originally Posted by
mahasamatman
If UA starts up a Premium Economy cabin, I'm sure you'd have to pay for it to request a Business Class upgrade. Ugrading from Economy would only get you to Premium Economy.
Not so different from the W premium UA already imposes on GPUs. In some ways better (even if slightly more expensive) because at least the fallback - a seat in PE - would not be complete waste of the additional fare.