In my opinion, this is one of the best things to happen to 'classic' 68k Amiga development in a long while.
As has already been pointed out, it has the potential to implement patches such as VisualPrefs, Birdie et al in a clean manner (assuming the source becomes available), whilst integrating the updated features of AROS.
It is running really well for me here, under WinUAE on my AIAB setup:
http://www.amiga.org/gallery/index.php?n=1235I believe the freetype2.library does not require the AfA-OS patch to be running, therefore you can use TrueType fonts with your preferred applications. However, as aspects of graphics.library and diskfont.library in ROM need to be replaced in order to add functionality such as anti-aliasing, the AfA-OS patch is required.
Indeed, I wonder if it will be possible patch individual modules/libraries of the ROM image itself (similar to Blizkick perhaps), thus offering an even method of implementing the updated features under 68k.
Cheers,
James