Auto shift
My "new" hauler has a 10 speed autoshift (eaton/fuller). Like someone said above, you must use the clutch to take off and to stop, but except for that, you never touch the clutch pedal. The newer ones, don't even have a clutch pedal, as the computer "knows" when to engage the clutch, based on deceleration, and speed (like below 2 mph, or some such). I have mine start out in 3rd unloaded, and 2nd when loaded. Also, I can have it skip shift when empty, using only 3rd, 5th, 7th, 9th, & 10th.
While I really like mine, I don't think these trannys would be too popular in a pickup. Why? You simply can't "hot-rod" this system. It takes a while to get to speed, and because it's a non-syncronized clutchless operation, you cannot rush gear changes. The computer shifts when it's time, and not before. No speed shifting, no burn-outs, no racing... period. This would make the Dodge Ram drive like an ... er... um... TRUCK! A truck equipped with this type of transmission would prove to be a real dog in town, compared to its "normal" automatic transmissioned counterparts.
I know that for those of us that use their truck to tow heavy loads, this wouldn't matter. But there is an increasingly large amount of people buying diesel pickups because they are powerful, fun, and economical to drive. A large amount of folks driving a Cummins don't really "need" it, they just "want" it. I see many, many Dodge Cummins that don't even have hitches installed. To each his own, and how you use your truck is purely your business, but I would bet that if these transmissions were installed, the fun factor would be reduced, and more people would choose one of the other brands.
Just my Opinion, and you know what they say about those... .