To be honest, the trailer looks like fallout 4 in space. Same stiff animations and the graphics are already below the current gen.
I seriously doubt it's going to be very different from the previous engine but I don't really care as long as the game gives a proper 'bethesda' experience.
Starfield's new Creation Engine took 'so long to do,' Bethesda's Todd Howard happy with results (www.tweaktown.com)