Totally agree with first two paragraphs, but here's a great idea that'll never be implemented:
Let colorization begin! But have a setting on the TV (and the DIRECTV® receiver for legacy TVs) that'd remove the RGB info for those who choose to watch in its near pristine state. Then everyone would be happy. (Except the usual suspects.)
Never gonna happen. Manufacturers are not going to waste resources developing and implementing a feature where there is no interest. There isn't a demand for colorization.