From a spec writer perspective, the short answer is that it has hotkeys, formatting based on element type, and autocomplete.
Beyond that, there are versioning tools (screenplay versioning can get a bit esoteric), alternate dialogue capabilities, scene numbering and reporting tools, and a lot more. It also has a lot of capabilities related to production, such as omit functionality, watermarking, script locking, etc.
Final Draft gets bagged on a lot for being expensive and ugly, but it really does have a ton of specialized tools that are incredibly powerful if used correctly.
Beyond that, there are versioning tools (screenplay versioning can get a bit esoteric), alternate dialogue capabilities, scene numbering and reporting tools, and a lot more. It also has a lot of capabilities related to production, such as omit functionality, watermarking, script locking, etc.
Final Draft gets bagged on a lot for being expensive and ugly, but it really does have a ton of specialized tools that are incredibly powerful if used correctly.