AAA was to be something of a bridging solution between ECS and Hombre... Instead AGA was rushed out (despite what anyone says, it's little more than a bug fixed ECS) as commodore was losing money hand over fist and marketed as a new generation...
But ultimately the Amiga line would have ended with AAA, hombre was the future... There are suggestions by various engineers that the Amiga operating system would have been ported over... But C= execs wanted WinNT.
According to Dave Haynie both the AAA & hombre were supposed to co-exist.
"keep in mind that during most of the life of
the Hombre project, it was assumed that AAA would exist and it would be
much too expensive for games machines or very low end personal computers"
AGA wasn't a bug fixed ECS, but it was ECS with faster memory access and a couple of bitplanes and their colour palette entries tacked on. Copper and display can make real use of the faster memory access but the blitter can't.
I don't think WinNT was ever a serious prospect. They were just trying to drum up interest.
It's likely that any new Amiga released after Hombre was finished would be PCI based with the potential of using off the shelf display cards, or a hombre card. Backward compatibility would come from an OCS chip that output into the graphics card ram (they always wanted ECS/AGA software to use the libraries so they would work on any hardware).
However this is based on what Dave Haynie has talked about doing and not necessarily what commodore would have actually built.
