Irrelevant. This discussion was about the one and only use in town right now of "edge-to-edge" in a major campaign to sell new tablets.
"All screen" is more ambiguous. For starters "all screen" is not a pre-existing term. It could be used to mean there's no other elements or buttons on the front, except the screen. "All screen".
"Edge-to-edge" on the other hand, has explicit meaning built in. The primary component of which is measurement. "Edge-to-edge" refers to not one, but two hard edges, and describes that which spans in full from one edge to the other. There's no vague interpretation possible unless you force a square peg through round hole of English. It's either an edge-to-edge screen, or it's not.
I had to measure a washing machine recently to find out if it would fit. I measured edge-to-edge, and by that I mean the actual left edge to the actual right edge. But you knew that already without me explaining.... because I said "edge to edge".
See my other comment in this thread, there is at least six years of prior usage by multiple big tech companies describing their product's screens as "edge-to-edge" without literally meaning edge-of-device to edge-of-device, with links.
And see my other other comment where I wonder why "edge-to-edge" has your goat, when Apple describing the iPad Pro as "all screen" doesn't. Is that intended to be taken literally as well? There's no CPU, no memory, no battery, no glass, no other components, all screen?
Because the device is right there, it clearly has parts which are not screen, why aren't you frothing at the mouth about how it's a lie intended to "attract suckers" instead of a non-literal highlighting that the screen is large?
Like "all butter cookies" - that's a lie for suckers to think they are made of butter and no other ingredients, right? Because there's no way it could be read except literally, is there?
Non-literal descriptions are everywhere.