I don’t see how a Blu-ray player connected over HDMI to a TV is supposed to look dramatically different than a PC hooked up the exact same way, I think your calibration comment is moot in this instance.
If your TV is calibrated for rec.709 for your Blu-ray player, but it isn’t calibrated for RGB for your PC, then it very much will look different, and the Blu-ray will be better. Since most calibrators only calibrate for rec.709 anyway, it’s very non-moot.