While the team was watching and rewatching the footage from Bethesda's E3 Fallout 4 segment, we came to the conclusion that weapons would be split into "Energy" and "Physical".
Check out these screen caps:
Notice how damage resist has two separate values, a shield and a lightning bolt?
Three values this time, a shield, a lightning bolt, and a biohazard symbol (radiation resistance?).
Notice the crosshair sign next to damage.
The crosshair sign next to damage has been replaced by a lightning bolt.
My conclusion: instead of having Damage Resistance and Damage Threshold, we will have Damage Resistance and Energy Resistance, which I think is an acceptable tradeoff. Anything is better than JUST DR.