I am only responsible for creating the list and one of the projects (bitcoincity.info), all others were found online and have different authors. This list includes only realtime visualizations of bitcoin related objects, like transactions, blocks or nodes. There are many great block explorers with awesome ways to visualize txs, blocks, chains, etc., but you're watching historical info and not realtime, so those are not the purpose of this list. These visualizations show many different ways you can take some data and present it in a pleasent way. Some are more detailed than others, some are more data-driven while others give more relevance to the visual part. I agree that most might not have a great practical use, but it depends on what you need. In some of them, you can have them monitoring your own addresses with a little tweak, or make analysis on specific types of transactions...

@btc_enigma: your idea sounds interesting, but I don't think you can predict for sure how long it will take until a tx gets included in a block, since it's always up to the miner to decide which transactions are included in his block.