As far as what's going to be more desirable, that's anyone's guess. It's hard to predict what the standards will be for television in the future, if they'll be watchable via normal broadcast or if owners of working sets will be limited to VCR and DVD. I do think that since the broadcast standard made the big leap to DTV (and that took how long), another change in the signal isn't out of the question in the next decade.
Two schools of thought here. First, we can look at say a Model T Ford, an antique refrigerator, an old radio, what have you. While most people want them to work and use and enjoy them, there will always be people that only want to display them and don't care if they work.
The historical value comes long long down the road, say in a hundred years, when for most, it'd just be a display piece in the same way that nobody would hitch up an 1800s Wells Fargo stagecoach to ride around the property, serve the daily family dinners on a Stickley table, or stick an antique Indian canoe in the water for an afternoon on the lake. At that point, who can say?
The thing is, we won't be around 100 years from now. I say let's enjoy them while we can
