My opinion is that you are never going to be able to steal ships (not even from NPC's) .. I have serious doubts about ship boarding too. As others have said, you get a system message that you are being boarded, Esc to menu - 15 second timer, safe. But my big question is what happens if you die whilst outside of your ship? .. It's gonna have to be some serious handwavium to get around that little chestnut. My only guess would be that we can now be cloned, but doesn't Star Citizen use that? .. would it look like FD are "Stealing"* ideas from C.R?
*For want of a better word.
*For want of a better word.