Room measurements typically exhibit a downward “tilt” from low bass to high treble of 6 up to 15 dB. This is caused by a number of factors including reduced dispersion and greater absorption in the room at high frequencies. Do not attempt to EQ your room measurement completely flat – that will most likely sound overly bright.
This is something all acousticians live by. It isn’t opinion. It’s fact. This is why no auto-eq attempts to implement it. If you look at the Dirac documentations for instance, you'll see this built in.
We are used to seeing close miked, "quasi-anechoic" measurements of speakers and electronics, so we expect speakers to be flat in the room, and god help you if you hear it! :)
Also, this is not new. The B&K speaker curve (which I worship as a god) is what, like 60 years old by now?
Best,
E