In a dSLR vs mirrorless discussion, that is a pretty good statement.no wonder, you don't have to turn off the D7000.
I can shoot my D7200 all weekend and Monday, on a single charge. So, I stopped carrying a spare battery.
Whereas my Olympus will only shoot for 4 hours, or less. Continuous on, same shooting situation as the dSLR, sports, where there is very little opportunity for the camera to go to sleep.
The "or less" refers to different run times for different camera and lens combinations. One combo will drop the run time down to only 2-1/2 hours. For this reason, I have FIVE batteries for one of my mirrorless cameras.