If you want to throw all of your previous work on the 360 for the exclusive content that will be coming in TTK and want to pay for another subscription (PS Plus), go with the PS4. If you also play things like Call of Duty and are interested in Black Ops 3 and beyond, PS4 would be a good idea since they are getting dlc earlier than Xbox. If you want to continue using the same characters and play your 360 games as well, Xbox one is also a good choice. If you bought destiny and the season pass digitally for your Xbox 360, you automatically got a digital upgrade for the Xbox one, so you won't have to rebuy anything.