Indeterminate tomatoes can grow very tall although not as big as the one at Epcot Center. I’ve seen pictures of a twenty foot tomato plant but I believe it was grown somewhere warm in the south. Indeterminates will grow continuously unless killed by frost or disease.
The world’s largest tomato tree was grown in the experimental greenhouse at Walt Disney World Resort. It produced over 32,000 tomatoes in the first 16 months after it was planted, and holds the record for the most tomatoes in a single year, according to the Guinness Book of World Records. Huang, from Shenyang, China, discovered the plants in Beijing, China, and after meeting with scientists responsible for those plants he brought the seeds to Epcot. The plant’s single vine grows tens of thousands of golf ball-sized tomatoes which are harvested and served at restaurants across Walt Disney World Resort. According to what I’ve read, It is grown conventionally in a container not hydroponically. Remember too, that it is grown in a greenhouse with constant attention and lots of fertilizer, most likely beyond the scope of the home gardener, even with a greenhouse.
I can remember seeing the plants in Epcot grown without soil a couple of decades ago. I wish i could have that kind of success with mine. Blight has been really bad the past two summers and my yield has been minimal.