Tretton said you get the "PS+ edition of Drive Club". So it will be limited in some way.
This could be a troubling trend for PS+. On PS4, maybe instead of full fledged retail titles, you get trial versions of them. Limited "PS+ versions". Then maybe they give you a discount to buy the full game.
Or, maybe this is how they handle PS+ for a few years on PS4 so they can build up a library of games they can then offer for free.







