Technology evolves rapidly and most of the changes have to be wired within the television to work. It would be great if companies made it easy somehow, but as it is I don't think many owners would be up for it. You can upgrade your viewing experience in other ways like adding a soundbar.
It is true that technology evolves rapidly and trying to catch up with it can prove costly. In as far as I know, a soundbar merely improves the TV sound, unless I am mistaken. I wish there were easier ways of upgrading.