Thunderbirds presents a 2020 that functions as a high-gloss, live-action interpretation of the 1960s "Supermarionation" aesthetic. Set on the secluded Tracy Island, the world is defined by International Rescue, a private, non-profit organization utilizing near-impossible levels of aerospace technology to mitigate global disasters. While the film focuses on the youngest Tracy son, Alan, the backdrop is a planet that has achieved a high degree of technological integration, where massive, specialized vehicles like the nuclear-powered Thunderbird 2 operate with impunity across international borders.

Societally, the film suggests a world where billionaire philanthropy has evolved into a paramilitary global emergency service. This dynamic implies a certain level of governmental inadequacy or a shift toward privatized global safety. The technological landscape is dominated by heavy machinery, VTOL (Vertical Take-Off and Landing) capabilities, and advanced robotics, such as the character Brains' hydraulic-assisted inventions. The Earth remains the political and operational center, though the presence of Thunderbird 5 in permanent geostationary orbit indicates a robust, routine orbital infrastructure that surpasses our actual 2020 capabilities.

Compared to the actual 2020, the film’s predictions for aerospace engineering remain largely aspirational. While we have seen the rise of private space firms like SpaceX, the film's vision of reusable, rapid-response heavy-lift rockets is far more advanced than current reality. However, the film accurately anticipated the ubiquity of holographic-style interfaces and biometric logins, which are now standard in high-end security. The FAB 1 amphibious vehicle predicts the ongoing, though still niche, development of flying and swimming cars, but the film’s version operates with a seamlessness that remains science fiction. Analysis suggests the film's 2020 is less a grounded prediction and more a "painless" futurism where technology solves every crisis without the friction of modern logistics or physics.