This may have been asked and answered before. If so, I'm sorry for not searching hard enough but can you help with the following questions
If I buy a PS4 and link it to my PSN account can I still use my PS3 on that account (not at the same time)?
If so, specifically on CoD:Ghosts would my stats, weapon unlocks, etc. update between machines?
I'm thinking if I do buy a PS4 I want to keep the PS3 for gaming with friends who don't update. I realise I would have to get two copies of the game