hate a big black screen sitting there when not in use?
that is one of the worst things i have ever heard, in fact a lot of people choose their tv's by the style of them these days, because they prefer the slimness and the stand of certain types / brands and the way they look comes into the purchase decision, i dont care about the style i choose the tv on size, PQ and price.
do they also hate having a big car sitting outside in the driveway when not in use?
Some people don't like or want big car full stop, whether it is in use or not. Who wants to park a limo everywhere anyway. Who has the space to park a 50 tonne lorry. Not everyone wants to drive around a car that does 5mpg with a big engine. Just because it is not in use doesn't mean it disappears off the face the earth. You may not have to look at the car when it is parked, but the TV is in the living room so it is right there in your face even when it is off. As stated, if it is a TV room, fine, go nuts, but this is a living room. Hell, I know people who has nothing but a bed in their bedroom, no TV, no radio, nothing. They think a bedroom is just that. Not everyone are into TV like you do, or want a 60" TV in every room.
or hate having a big dining table in the dining room when not in use?
That's fine if you have a dinning table in the dinning room. I doubt you have your dinning table in your bedroom. The space that you have the dinning table for is a space measured and allocated for it, for that size of the dining table. You don't put a dinning table for 20 people in a space that can only fit 10 leaving the rest of the room so small you can't even pull the chairs out. You can't really apply the Cinema screen argument here, as I said earlier, it's a cinema, when the movie ends you walk out. At home when the movie ends the TV do not disappear. Unless it is in a separate room where you can walk out and close the door behind.
or hate having a big home where half the room's do not get used?
Sure, I want to live in a place the size of Buckingham palace by myself too. Or do I want to afford to run such a place with heating, council tax and people to take care of it. Or do I want somewhere that is right size for me and my family.
or hate having a huge garden when it's not being used?
Have it the size of a safari park if you like, if you don't want to maintain it and leave to grow like a jungle.
There is something to be said being content.