Bethesda has already mentioned that they're building the engine for their next game from the ground up. http://pc.ign.com/articles/111/1112464p1.html.
"Id Tech 5 is the best thing in the world at doing a very static environment that looks pretty and you're going to run through. But for the kinds of things I like to do, I like the world to be more dynamic."
:facepalm:
the mans serious about that is the sad part
honestly the most "dynamic" thing about his games to date from a GGE pov was probably the nukeing of Megaton and all that realy was was a change out of one asset set for another where megaton was.
Honestly the average "B movie" mmo clone has a more dynamic world than anything they have put out to date
Vehicls move, Ships move, Peple move around on moveing ships, Heck a number of games are useing SIMs style programing for there npcs to make them more realistic,
even little things like laders on the outside of buildings work without havine you do a cutseen and teliport to a spawn point on top in another room or relying on silly ramps spread all over the place.