Mostly people don't bother with all this stuff to start with, and the manufacturers are so busy trying to sell new TV's that they don't even bother to build good one to begin with.
For instance, I just set up a Sonos 5.1 surround system. During the process I checked compatibility with my TV and I found this list of televisions that don't pass 5.1 surround data out the TOSLINK port under various conditons: https://sonos.custhelp.com/app... . Some only pass it from specific sources and some don't pass it at all. I'm lucky, my TV works under all conditions. Never mind problems with HDMI/HDCP/CEC/ARC compatibility.
I don't care about increased resolution because I can't be sure that the next TV I'll buy will meet my minimum specs. Purchasing is a gamble these days and once you engineer a working solution why would you upgrade? I didn't jump on the 3D idiocy and I'll bet you didn't either. Even if you have a 3D TV did you buy extra, or any glasses for it?
The producers, in a genius move enabled by "vertical integration", will add a new broadcast or regional flag or change an encryption key or some shit and stop making media in the old format. People will run like lemmings to Walget or TarMart to buy new equipment because the old stuff has been artificailly obsoleted. It's enough to make me stop watching altogether. Good luck selling your advertising time when no one gives a shit assholes.