In GTA Online you can play to ps3, ps4, xbox360, xbox one and pc with the same account!
It would be nice to do that in DC too (in ps3, ps4 and pc). I think it's helpful because sometimes i can't play ps4, my brother take it to his house
and i'm waiting one week to play DC.. and if i have paid for legendary, i loose the days. So i have my PC only.