I agree with GREQ; no. Sooner or later there will be a headphone with more detail than the SR-Omega, or more euphony than an HE-90, using some crazy technology like nanotitanium diaphragms, 7N silver voice coils, unobtanium magnets, etc.
Or perhaps an entirely new transducer type. Maybe some company will try a piezoelectric diaphragm. Maybe someone will manage an acoustic resonator. Who knows what could happen.