Although Bioware's devs say it's impossible it shouldn't be since other games have done that. Like Battlefield on PS3 to PS4, though you had to have digital copy of the game.
I guess Bioware just doesn't see last gen players important enough to try to even damage control. They pretty much offer no compensation over what they have done.
Battlefield was a launch title, and the offer was good for 4 months. You could easily make the same argument in this case for Diablo 3 or any of the remastered titles that exist out there.
Also what one title does, does not guarantee all titles can or will follow suite, if that was the case well then we would have seen more than Shadowrun as a Xbox360 cross MP platform.
Anyways this is outside of OPs question, so please use one of the existing threads for this.