Well, I remember when color tv was a luxury and most folks didn't own them due to cost. Our first color set was a 19" table top model on a cart that my parents WON in a Lions Club raffle. Dad was a semi-active member of the club and must have bought ten raffle tickets that he forgot about. He and I had gone to a hockey game when the club called the house and told my mother we had won the tv (I doubt she knew anything about the raffle until then). She drove to the donating dealer to take delivery of the set while we were still at the game. When we came home, she told us there was a new color tv in her station wagon and asked us to lug it out of the car and into the house.
At that time (late 1967) a 19" set was $500 and up. $500 for table models, more for "furniture" models. The cost of living then was about 20% of what it is today, so $500 then was about $2500 now. The first set they "bought" was a $350 Hitachi 19" set when the GE died after six years (it was never a very good set, which is probably why the merchant donated it for free to Lions Club for a raffle). The early 1970s was when color tv ownership in the USA surpassed 50%. Color tv sales began c.1954, but their $500 pricetag was like $5000 today, and sponsors didn't want to pay the added costs for a special feature that most viewers couldn't even see. Most color programs were one-time tv special programs, not weekly series. I believe Bonanza c. 1959 was the first series shown in color, and even then the first season or two was in B&W.
The cart feature was actually pretty useful. The GE set was placed in the den. The existing 19" Zenith B&W tv was shallow enough to sit on one of the built-in bookcase cabinets, but the color set was too deep to place it where the B&W sat. The cart allowed it to be placed in an optimal viewing area with some portability---limited by the length of its coaxial cable. No further furniture purchase was necessary, and the cart had a smaller footprint than any stand or table they might have purchased, because the cart was designed for the dimensions of the set. Since rabbit ears didn't work where we lived, due to terrain, the set wasn't truly portable in terms of being able to roll it into any room in the house---though had coax connections been installed in other rooms of the house, say, the living room, it would have been truly portable.
We had cable tv then (pulled in over the air channels from all of Los Angeles and San Diego) plus a rooftop antenna with a rotor, which my parents installed mainly for better FM stereo reception. The rooftop antenna signal and the cable coax were connected to the tv via an A-B switch.
There was a court case settled by the US Supreme Court in the 60s regarding cable tv. Subscribers such as ourselves, in San Diego, received signals both from San Diego and LA network affiliates. The issue was that local advertisers claimed that their ads weren't being seen if subscribers in a market received two different network affiliates showing the same program at the same time (i.e. an NBC program from Channel 4 in LA and Channel 10 in SD). The Supreme Court ruled that the non-local network affiliate (in this case, the LA station) had to be blacked out during prime time when both stations presented the same program.
In theory, this was fine, except that sometimes the black out of the LA network stations remained on OUTSIDE OF prime time, so that we couldn't see a program from LA say on Saturday afternoon which was not the same program being shown on the SD channel. By using the A-B switch and the rotor antenna, it was usually possible to pull in the LA station, though the reception was often inferior to what we got on cable when it wasn't blacked out. The independent LA stations (KTLA 5, KCOP 9, KTTV 11, and 13==can't remember its call letters) were not blacked out. The black out only applied to KNBC 4, KABC 7, and KCBS 2.