If we talk about NFS let's talk only about the GOOD NFS. Since all games from this franchise became shit every single year i would love to see MW2005, Carbon, Underground 2 or Hot Pursuit 2010 to be real.
Also a real world based on GTA V/Online would be so fucking chaotic and with no sense xD, i'm imaging people on the streets runing away from a random guy trying to hit or kill them, helicopters and planes shooting all over the place and super powered cars runing on the streets with 300km/h.