If they miss the fairways with their driver now it sure isn't because they mishit the ball. Mishits can still cause a pro to miss the fairway with an iron, but certainly not with a 460cc driver with its huge sweet spot and MOI values many times that of a persimmon driver or 1 iron.
Pros can still miss the fairway in other ways, of course, but that's because they aren't able to bring the club back to the ball on a square path with the face square to the target. No technology will ever fix that, or at least I sure as hell hope not! They've mostly chosen to give up the additional accuracy the modern driver has afforded them in pursuit of additional distance (e.g., Tiger's driver swing where both his feet appear to leave the ground at impact) But that's because the ball flight (all carry, little roll) makes flogging a smart strategy.
If they had 40 yards less carry and 40 more yards of roll on a given drive, I'll bet you'd see them swinging a bit slower and more in control, and you wouldn't see them being so inaccurate with their drivers, because flogging wouldn't be so smart. At least not on a longer par 4 where your attempt to get a 9 iron from the fairway leaves you with a 5 iron from the rough if you fail. Today its pretty close to being a 9 iron either way, so why not grip it and rip it, and hope it stays away from the trees?