I have to add...I think the mere suggestion of a larger screen in the PB360 is nonsensical...it's primary attraction is the 5" panel.
I suspect what people want is to have the integrated cover used on larger format devices. That makes sense, to pine away for a larger screen, even if external and/or modular, in a device designed for the specific reason of easier portability is, well, beyond my comprehension. I know I would never buy a 5" device with the idea of adding a larger screen...it's, well, it's...oh geeze, I simply do not see any value in the idea and cannot get my head around it as the logic eludes me...help?