This is a non-exhaustive list of the new features of AmigaOS 4.0 The Final Update since Update #4:

• Exec
  • New memory system
    • Low Fragmentation, even with long uptimes
    • Lots of speedups (for example, memory pools are 10 to 20 times faster than before)
    • Named memory
  • Now uses the MMU to write-protect the .rodata sections of ELF binaries

• 680x0 emulators
  • Improved compatibility
  • JIT emulator is between 10 to 50% faster

• DOS
  • 64 bit support for file sizes.
  • New directory scanning and object examination API

• Intuition
  • Support for legacy programs requiring a planar screen: normal, HAM6 and HAM8 planar screens are promoted to RTG
  • Customizable truecolor mouse pointer (in hardware sprite mode on Radeon boards, and in software sprite mode on all boards)
  • Navigation of oversized screens via [Left Amiga] + numeric pad

• Workbench
  • Support for native 32 bit icons with normal and selected image
  • Support for loader/saver modules for third-party icon formats
  • Customizable highlight effect for selected single-image icons
  • Customizable "left out", "no drop" and "disabled" icon symbols
  • Removed the remaining 30 character filename length limits

• Storage controllers support
  • New driver for ITE IT8212 IDE controller
  • New driver for SCSI 53C8xx-based controllers
  • Support for IDE ct-flasher hardware added as contribution

• General
  • Support for alpha channel in IFF ILBM for easy loading, saving, and clipboard copy/paste of truecolor data
  • No more black background in MultiView when displaying truecolor pictures with an alpha channel
  • MultiView allows the Workbench screen to be closed and reopened
  • Smoother appearance for colorwheel.gadget
  • Customizable images for requester.class requesters
  • Many parts of OS4 now support the mouse wheel

• ramdrive.device
  • The classic RAD: doesnt survive a soft reboot anymore
  • The new RESRAD: survives a soft reboot again
  • The new BOOTRAD: offers booting from a disk image which survives a soft reboot.

• console.device
  • Changing the system default keymap now immediately affects all console windows which dont use a private keymap.

• printer drivers
  • All printer drivers except Printers:File are PPC native
  • The PostScript printer driver now supports printing pictures in greyscale, B&W and landscape modes. It now uses the current system default charset for text printing to ISO-8859-1 before.

• Printer preferences editor
  • Now PPC native, some new features

• a1floppy.device
  • New driver for the AmigaOne which has a floppy disk port.
  • Supports booting from floppy disk.
  • Allows limited exchange with Classic Amigas.

• ft2.library
  • Now supports algorithmic font emboldening.

• Fonts
  • The default fonts are now the DejaVu fonts which support more different character sets than the Bitstream Vera fonts.

• USB
  • USB mice and keyboard can now be used to access and navigate EarlyStartup
  • Keybord drivers respects users keyboard key repeat delay and speed
  • Keyboard drivers can now reset into UBoot

• Boot menu
  • Early boot menu can be used with the only a keyboard.
  • Adjusts its GUI to the screen height which looks better on A1

• Picasso96 and drivers
  • Radeon Overlay (PIP) support
  • Extended P96 PIP API (double/triple-buffering possibility allowing perfectly smooth animation)

• AmiGS
  • Localized
  • Improved printing preferences (page selection, double sided printing, collation)

• AmiPDF
  • Localized
  • Improved printing preferences (page selection, double sided printing, collation)
  • Additional character set support for bookmarks and text copying
  • More search options

• Ghostscript
  • Updated to the latest version (8.54)