In the demo he puts Luck to 10, but the forward arrow is still there. This would be interesting, maybe we gain an extra SPECIAL point every 2-3 levels as well as a Perk.
It would go well with the theory that there is now only SPECIAL and Perks, as seen in the new PipBoy and Perk-Chart in the garage picture. Getting only Perks on level ups would be very rpg-lite so this is good if true.