I read that earlier and I think the original article that it spun from, didn't say they were really considering it (Samsung), but that with them switching to amoled displays, that with the cost savings, they could if they wanted. They also mentioned the hard button and others being removed, so that you would have a device that while the screen is larger in dimensions, you wouldn't have that much more of a physically larger device.
They gave the example of the one x and the toting of the screen size, but that the usable screen size is not that large due to the buttons being included in the display. I haven't measured my note, but I think from looking that button area is anywhere from. 5" to. 75". That's a 6" screen, and if they do something slick like say a true full, all display (I mean the bezel is tiny) and the lighting for say the notification led is on that display, I think, just roofing it, you would have your 6.3" full front display.
If so, then your taking about a device exactly or just a bit larger. But the crazy thing could be that they incorporate their new flexible display in it, then, you have the bar makings of something crazy slick!