Reynard said:
I think it is going to be far more about combat
4e will probably have the best-developed rules of any version of D&D for the design and the resolution of combat challenges. But if the rumours are true, it will also, probably, have the most sophisticated set of rules both for both the design of, and the resolution of, social and environmental challenges.
So I don't think it fair to say that it will be far more about combat. It
will be more about rules - rules for character building, rules for challenge design, rules for action resolution - and therefore will be even less like 1st ed AD&D, but that is a different matter. AD&D's absence of rules is extremely unusual for an RPG (compare it to any of its contemporaries - even T&T has more sophisiticated rules both for character build and action resolution), so it's not that surprising that D&D has become more typical as it has gone through iterations.
Reynard said:
[it is going to be] far more about instant gratification
If you mean "instant gratification of the PCs within the gameworld" then, again, there is no reason to believe that to be true. PCs in 4e will suffer from time to time, just as PCs in every other RPG suffer.
If, on the other hand, you mean "instant gratification of the
players at the gaming table", then I hope so! When I sit down to play any other game, I get the instant gratification of the pleasure that particular gaming experience delivers. Why should D&D, which is (after all) a game, competing for my time with other possible games, not also be fun to play?
Now, if your point is really that you don't enjoy playing a game where much of the play experience is interacting with, and mediated via, the rules, then that is a different thing. For such a person, 4e will
not be gratifying, whether instantly or otherwise.