The film depicts an Earth rendered uninhabitable by climate change, with the last living humans obese space tourists who communicate solely via video call and rely on meal replacement smoothies for sustenance. There are eerie similarities to much of our current reality, with extreme weather events rising in frequency, obesity rates soaring, Zoom calls taking over our lives, and the rise of meal replacement firms such as Soylent and Huel.

https://www.bloomberg.com/news/articles/2022-04-20/pixar-s-wall-e-dystopian-predictions-came-true