I hope I'll sprout wings and be able to fly, but I'm not holding my breath
If you added 0.3" to the screen, the screen itself might already be wider than the g4. I'm sure they're trying to minimize the added bulk but I don't think it's realistic to ask for it to be the same overall size.
Speaking only for myself, 5.5" was already bigger than I wanted. I don't want phones to keep growing. Certainly not if only the massive ones will have the good specs.
I wonder if the Note 5 design choices (no SD, no removable battery) will increase interest in the G4 Pro. I hope so. I would like sales #s to help illustrate that not everyone likes the direction that Samsung is taking.