Visuals are 50% of the theme. Audio is the other 50%.
There are several ways to achieve the JARVIS look, ranging from simple skin packs to complex multi-app setups: YouTube·Digital Bear Productions windows 11 jarvis theme
While static wallpapers work, the Jarvis aesthetic is alive. It moves. The (available on Steam) allows you to use animated, interactive wallpapers. Visuals are 50% of the theme