The document discusses several advantages of implementing certain functionality at the HTML level rather than through redundant code. This includes standardizing practices like slider logic, making geo-location simpler, and enabling cross-platform development. Additional benefits mentioned are the ability to create seamless connections between the browser and server through websockets, running parallel server-side processes using web workers, providing consistent interfaces across browsers and devices with canvas, and connecting different applications to the same backend services. Location data passed to maps and applications can also allow for customization based on user location. HTML5 form elements help simplify form development.