From the information they released, the gamut is fully sRGB and the glass is thinner, I would expect it to be noticeably better. I am a professional photographer and know that full sRGB should be much more accurate color wise. In some cases it will be more saturated, but more importantly more accurate.
The fact that the glass is thinner (touch is built into display, not just layered over) will improve the brightness and sharpness of the image. Even with high quality gorilla glass, less layers = better display. I am predicting this better display to be one of my favorite new features when it arrives tomorrow.